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Academic literature on the topic 'Noble metal analyses'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Noble metal analyses"

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Stucchi, Marta, Daniela Meroni, György Safran, Alberto Villa, Claudia L. Bianchi, and Laura Prati. "Noble Metal Promoted TiO2 from Silver-Waste Valorisation: Synergism between Ag and Au." Catalysts 12, no. 2 (February 19, 2022): 235. http://dx.doi.org/10.3390/catal12020235.

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Wastewaters from precious metal industries contain high amounts of noble metals, but their efficient recycling is hindered by the wastewater complex composition. Here, we propose an innovative approach for the efficient recovery of noble metals contained in these metal-enriched wastewaters as precursors for the synthesis of noble metal nanoparticles (NPs) and supported metal catalysts. Silver NPs were synthesized from Ag-enriched wastewater and then deposited on TiO2 to prepare photocatalysts. Then, further promotion of the photocatalytic activity of Ag-modified TiO2 was achieved by the addition of as little as 0.5 wt.% of Au. STEM-EDS analyses proved that Au NPs were located on Ag or AgOx nanoparticles. The contact between the two metal-containing NPs results in charge transfer effects, appreciable both in terms of oxidation states determined by XPS and of optical properties. In particular, the plasmon band of Au NPs shows photochromic effects: under UV light irradiation, bimetallic samples exhibit a blue-shift of the plasmon band, which is reversible under dark storage. The activity of the materials was tested towards ethanol photodegradation under UV light. Adding 0.5 wt.% Au NPs resulted in a promoted activity compared to Ag-TiO2, thus showing synergistic effects between Au and Ag. Ethanol was completely converted already after 1 h of UV irradiation, acetaldehyde was formed as the main oxidation product and fully degraded in less than 180 min. Notably, bimetallic samples showed ethylene formation by a parallel dehydration mechanism.
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Yonezawa, Tetsu, Toshihiro Tominaga, and Naoki Toshima. "Protecting Structure Analyses of Organic Molecule-protected Nanoscopic Noble Metal Clusters." Polymers for Advanced Technologies 7, no. 8 (August 1996): 645–51. http://dx.doi.org/10.1002/(sici)1099-1581(199608)7:8<645::aid-pat578>3.0.co;2-w.

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Awad, Hind Dhari, Mohammed Khamas Khalaf, and Alaa Nazar Abd Algaffar. "Noble Metal Thin Film Thickness Optimization for Sharp Surface Plasmon Resonance Reflectance Curve." Materials Science Forum 1039 (July 20, 2021): 442–50. http://dx.doi.org/10.4028/www.scientific.net/msf.1039.442.

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The production of a high-sensitivity surface Plasmon resonance (SPR) sensor depends on a few main factors, such as metal thin film types and thicknesses, light coupling techniques and acceptable EM wave polarization modes. This work is carried out to investigate the impact on the SPR characteristics of noble metal thicknesses, namely gold and silver, for optical sensor applications. To excite surface Plasmon polaritons (SPP), a Kretschmann prism coupling was used. The thicknesses of noble metal thin films were varied between t=30nm and 60nm. The characteristics of SPR peaks such as Q-factor and FWHM were studied in SPR signal analyses. In comparison with silver, Q-factor results showed an outstanding optical property of gold at t= 40 nm due to its high Q-factor values, which confirms its ability to produce excellent SPP quantities. In conclusion, gold noble metal at t= 40nm is capable of producing optimum SPR. In the development of the highly sensitive SPR sensor, this excellent criterion put gold as a spectacular candidate for optical sensor applications.
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Sun, Zhenyu, Lei Fu, Zhimin Liu, Buxing Han, Yunqi Liu, and Jimin Du. "Synthesis of Noble Metal/Carbon Nanotube Composites in Supercritical Methanol." Journal of Nanoscience and Nanotechnology 6, no. 3 (March 1, 2006): 691–97. http://dx.doi.org/10.1166/jnn.2006.128.

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A simple and efficient route has been employed to deposit noble metal nanoparticles (Pt, Ru, Pt–Ru, Rh, Ru–Sn) onto carbon nanotubes (CNTs) in supercritical methanol solution. In this method, the inorganic metallic salts acted as metal precursors, and methanol as solvent as well as reductant for the precursors. The as-prepared nanocomposites were structurally and morphologically characterized by X-ray diffraction spectroscopy, transmission electron microscopy (TEM), scanning electron microscopy, and X-ray photoelectron spectroscopy analyses. It was demonstrated that the CNTs were decorated by crystalline metal nanoparticles with uniform sizes and a narrow particle size distribution. The size and loading content of the nanoparticles on CNTs could be tuned by manipulating reaction parameters. Furthermore, the formation mechanism of the composites was also discussed.
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Yu, Lu, and Na Li. "Noble Metal Nanoparticles-Based Colorimetric Biosensor for Visual Quantification: A Mini Review." Chemosensors 7, no. 4 (October 31, 2019): 53. http://dx.doi.org/10.3390/chemosensors7040053.

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Nobel metal can be used to form a category of nanoparticles, termed noble metal nanoparticles (NMNPs), which are inert (resistant to oxidation/corrosion) and have unique physical and optical properties. NMNPs, particularly gold and silver nanoparticles (AuNPs and AgNPs), are highly accurate and sensitive visual biosensors for the analytical detection of a wide range of inorganic and organic compounds. The interaction between noble metal nanoparticles (NMNPs) and inorganic/organic molecules produces colorimetric shifts that enable the accurate and sensitive detection of toxins, heavy metal ions, nucleic acids, lipids, proteins, antibodies, and other molecules. Hydrogen bonding, electrostatic interactions, and steric effects of inorganic/organic molecules with NMNPs surface can react or displacing capping agents, inducing crosslinking and non-crosslinking, broadening, or shifting local surface plasmon resonance absorption. NMNPs-based biosensors have been widely applied to a series of simple, rapid, and low-cost diagnostic products using colorimetric readout or simple visual assessment. In this mini review, we introduce the concepts and properties of NMNPs with chemical reduction synthesis, tunable optical property, and surface modification technique that benefit the development of NMNPs-based colorimetric biosensors, especially for the visual quantification. The “aggregation strategy” based detection principle of NMNPs colorimetric biosensors with the mechanism of crosslinking and non-crosslinking have been discussed, particularly, the critical coagulation concentration-based salt titration methodology have been exhibited by derived equations to explain non-crosslinking strategy be applied to NMNPs based visual quantification. Among the broad categories of NMNPs based biosensor detection analyses, we typically focused on four types of molecules (melamine, single/double strand DNA, mercury ions, and proteins) with discussion from the standpoint of the interaction between NMNPs surface with molecules, and DNA engineered NMNPs-based biosensor applications. Taken together, NMNPs-based colorimetric biosensors have the potential to serve as a simple yet reliable technique to enable visual quantification.
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Lewandowski, Z., R. Avci, M. Geiser, X. Shi, K. Braughton, and N. Yurt. "Biofouling and corrosion of stainless steels in natural waters." Water Supply 2, no. 4 (September 1, 2002): 65–72. http://dx.doi.org/10.2166/ws.2002.0122.

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The noble shift in corrosion potential to values between +300 and +400 mVSCE and the accompanying increase in cathodic current density and polarization slope at mild cathodic potentials that develop during microbial colonization of passive metals, are collectively known as ennoblement. This phenomenon is of concern as the noble shift in the corrosion potential may lead to pitting corrosion. We have demonstrated, by growing pure cultures of manganese oxidizing bacteria (MOB) Leptothrix discophora SP-6 under well defined conditions, that microbial deposition of manganese oxides causes ennoblement of 316L stainless steel (SS). Exposing 316L corrosion coupons in lakes and streams supported this conclusion; the rate and extent of ennoblement were positively correlated with the rates of deposition and the amounts of biomineralized manganese oxides deposited on the surfaces of the SS corrosion coupons. X-ray photoelectron spectroscopy (XPS) analyses of the deposits from the ennobled coupons revealed a mixture of manganese oxides, as expected. Many natural waters can support growth of MOB. When manganese-oxidizing biofilms accumulate on surfaces of passive metals there is a potential for manganese redox cycling on the metal surface. This process is initiated by depositing minute amounts of manganese oxides on the metal surface. These microbially deposited manganese oxides are then reduced by the electrons derived from anodic dissolution of the metal; the metal is corroding and the manganese oxides are reduced to divalent manganese ions. However, since the manganese ions are liberated within the manganese-oxidizing biofilm, the manganese ions are immediately reoxidized, and the cycle continues.
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Li, Zhenhao, Kunlei Wang, Jinyue Zhang, Ying Chang, Ewa Kowalska, and Zhishun Wei. "Enhanced Photocatalytic Activity of Hierarchical Bi2WO6 Microballs by Modification with Noble Metals." Catalysts 12, no. 2 (January 21, 2022): 130. http://dx.doi.org/10.3390/catal12020130.

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Visible-responsive photocatalysts for environmental purification and fuel generation are, currently, highly sought after. Among the possible candidates, Bi2WO6 (BWO) has been considered due to its efficient light harvesting, stability, and promising activities. Here, hierarchical BWO microballs have been prepared using a hydrothermal method, and additionally modified with deposits of noble metals (gold, silver, copper, palladium and platinum) by the photodeposition method. The structure, morphology, photoabsorption properties, and surface composition of bare and metal-modified BWO samples were investigated by XRD, SEM, DRS and XPS analyses. The photocatalytic activity was evaluated by the oxidative degradation of model dye (methyl orange (MO)) under UV/vis, and hydrogen generation under vis and/or UV irradiation. It was found that hierarchical morphology is detrimental for high photocatalytic activity in both tested systems, resulting in the improved degradation of MO (ca. 65% during 90 min of UV/vis irradiation), and hydrogen evolution (0.1 and 0.4 μmol h−1 under vis and UV/vis irradiation, respectively). Moreover, the type of noble metal and its properties influence the overall photocatalytic performance. It was found that, under UV/vis irradiation, only platinum accelerates hydrogen evolution, whereas under vis irradiation the activity follows the order: BWO < BWO/Cu < BWO/Ag < BWO/Pt < BWO/Pd < BWO/Au. It was concluded that zero-valent metal is recommended for high vis response, probably due to plasmonic photocatalysis, efficient light harvesting ability, and co-catalytic role.
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Majerič, Peter, and Rebeka Rudolf. "Advances in Ultrasonic Spray Pyrolysis Processing of Noble Metal Nanoparticles—Review." Materials 13, no. 16 (August 7, 2020): 3485. http://dx.doi.org/10.3390/ma13163485.

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In the field of synthesis and processing of noble metal nanoparticles, the study of the bottom-up method, called Ultrasonic Spray Pyrolysis (USP), is becoming increasingly important. This review analyses briefly the features of USP, to underline the physical, chemical and technological characteristics for producing nanoparticles and nanoparticle composites with Au and Ag. The main aim is to understand USP parameters, which are responsible for nanoparticle formation. There are two nanoparticle formation mechanisms in USP: Droplet-To-Particle (DTP) and Gas-To-Particle (GTP). This review shows how the USP process is able to produce Au, Ag/TiO2, Au/TiO2, Au/Fe2O3 and Ag/(Y0.95 Eu0.05)2O3 nanoparticles, and presents the mechanisms of formation for a particular type of nanoparticle. Namely, the presented Au and Ag nanoparticles are intended for use in nanomedicine, sensing applications, electrochemical devices and catalysis, in order to benefit from their properties, which cannot be achieved with identical bulk materials. The development of new noble metal nanoparticles with USP is a constant goal in Nanotechnology, with the objective to obtain increasingly predictable final properties of nanoparticles.
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Biswal, Dillip Kumar, Dibakar Bandopadhya, and Santosha Kumar Dwivedy. "Fabrication and Thermo-Mechanical Analysis of Pure Silver-Electrode Ionic Polymer-Metal Composite (IPMC) Actuator." Applied Mechanics and Materials 110-116 (October 2011): 1199–206. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.1199.

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Till to date, fabrication of Ionic Polymer-Metal Composites (IPMC) are carried out successfully using noble metal such as platinum/gold as the surface electrode. In this work we have proposed cost effective fabrication method for IPMC actuator using non-precious metal electrode of silver (Ag). Chemical decomposition method is followed using Nafion as the ion exchange membrane to fabricate pure Ag-electrode IPMC. Microscopic and morphological analyses reveal that, silver particles penetrate well through the surface of Nafion membrane. The bending deformation measurement and analysis of the thermo-mechanical properties of the fabricated IPMC is carried out. The experiment results and performance of the IPMC actuator confirm that the fabrication of pure Ag-IPMC is feasible and can be used as artificial muscle material.
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Liu, Qian, and Toshio Fukaya. "Optical Features of Noble-Metal-Oxide Thin Films Under Irradiation of Blue Laser." Journal of Nanoscience and Nanotechnology 7, no. 1 (January 1, 2007): 362–67. http://dx.doi.org/10.1166/jnn.2007.18036.

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The optical reflectance and transmittance of Platinum oxide (PtOx) and palladium oxide (PdOx) thin films for ultrahigh-density optical storage are investigated using Z-scan technique under irradiation of blue laser (442 nm). The power thresholds of the PtOx and PdOx decomposition, 3.1 mW and 2.6 mW, are obtained respectively; the PtOx (PdOx) thin film is reversible and irreversible when input power is less than and more than 3.1 mW (2.6 mW). Deformation analyses by using an atom force microscope (AFM), which is formed in the micro irradiation region of surface on the thin film samples due to decomposition of the PtOx or PdOx driving the Z-scan, agree well with the Z-scan results. The optical features obtained at 442-nm wavelength are compared with those at 532-nm wavelength, and the threshold difference between the two wavelengths is also analysed in detail based on wavelength-dependent average power density and wavelength-selected absorption of the thin films.
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Dissertations / Theses on the topic "Noble metal analyses"

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Yu, Zhao. "Syntheses and Sensing Applications of Modified Noble Metal-containing Nanoparticles." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1623251284619434.

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Han, Qi. "Chemically modified electrodes with inorganic films of noble metal complexes and metal oxides : preparation, characterization and applications /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?CHEM%202002%20HAN.

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Bruzas, Ian R. "Biocompatible noble metal nanoparticle substrates for bioanalytical and biophysical analysis of protein and lipids." University of Cincinnati / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1553250462519941.

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Leyßner, Felix [Verfasser]. "Analysis of functional organic molecules at noble metal surfaces by means of vibrational spectroscopies / Felix Leyßner." Berlin : Freie Universität Berlin, 2011. http://d-nb.info/1026265657/34.

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Simpson, Lorna A. "Development of inductively coupled plasma mass spectrometry (ICP MS) analysis of noble metals in the environment." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252235.

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Suzuki, Noriaki. "Applications of time-of-flight secondary ion mass spectrometry (TOF-SIMS) and x-ray photoelectron spectroscopy (XPS) to study interactions of genetically engineered proteins with noble metal films /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/10618.

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Richards, Jeremy Peter. "The Porgera gold deposit, Papua New Guinea : geology, geochemistry and geochronology." Phd thesis, 1990. http://hdl.handle.net/1885/12535.

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The Porgera gold deposit, located in the highlands of Papua New Guinea (PNG), contains ~410 tonnes Au and ~890 tonnes Ag, distributed between a large lower-grade ore zone (78.6 million tonnes, 3.5 g/tonne Au, 9.9 g/tonne Ag), and a smaller highgrade zone (5.0 million tonnes, 26.5 g/tonne Au, 22.1 g/tonne Ag). Lower-grade mineralization occurs as stockworks and disseminations of auriferous arsenical pyrite associated with strong sericite-carbonate alteration, which cross-cut and overprint a suite of epizonal mafic stocks and dykes of the Porgera Intrusive Complex (PIC) and their sedimentary host rocks (Jurassic-Cretaceous shelf sediments). Minor free gold also occurs in base metal-sulphide veins associated with these alteration zones. Later, high-grade mineralization (locally up to 3000 g/tonne Au) occurs in quartz-oscoelite veins associated with the Roamane Fault (an extensional structure which cross-cuts the intrusive complex and the earlier dissemiriated ore). Abundant visible gold occurs with Au-Ag-Ag-tellurides in these epithermal-style, vuggy, banded veins. Deposition of both types of ore is shown by K-Ar dating of sericite (illite) and roscoelite to have occurred within 1 Ma of the time of emplacement of the PIC at 6.0 ± 0.3 Ma (2a; K-Ar dating of igneous biotite, and 40Ar/39 Ar dating of hornblende). Geochemical, isotopic, and petrographic studies of the PIC indicate that the intrusions represent a comagmatic, volatile-rich alkali basalt/gabbro - hawaiite (trachybasalt) -mugearite (basaltic trachyandesite) fractionation suite, derived from a larger fractionating magma chamber located deeper in the upper crust (aeromagnetic evidence). The intrusions are medium- to coarse-grained, and textures vary from porphyritic to ophitic. Mafic rocks contain olivine (pseudomorphs) and Cr-rich diopside phenocrysts, whereas hornblende (titanian magnesio-hastingsite), Ti-rich salite, and plagioclase phenocrysts occur in hawaiites and mugearites. Fluor-apatite and magnetite (Cr-rich in mafic rocks) occur as phenocrysts throughout the suite. High Fe3+/Fe2+ ratios in whole-rock samples, pyroxenes and amphiboles, and the presence of primary chromite/magnetite microphenocrysts indicate that the magma crystallized under conditions of high fo2. Least-evolved samples are characterized by low Ba/La (8 to 10), La/Nb (0.6 to 0.7) and Sr/Nd (~25) ratios, and LREE-enrichments ([La/Yb]cn = 15 to 19), which are similar to those of intra-plate alkali basalts, and distinguish the PIC from other Late Tertiary K-rich alkaline and calc-alkaline volcanics and intrusions found on the PNG mainland. Isotopic compositions are relatively depleted (ENd= +6, 87Sr/86Sr = 0.7035, 206Pb/204Pb = 18.64, 207Pb/204Pb = 15.55, 208Pb/204Pb = 38.45), and evidence is found for only limited amounts of crustal contamination. These data suggest derivation of the Porgera magmas by partial melting of a garnet-lherzolite source in the upper mantle. The incompatible element-, volatile-rich nature of the magma suggests that the mantle source region had undergone metasomatic-enrichment prior to melting ( < 0.5 Ga), and the timing of magmatism suggests that both metasomatism and melting may have been related to the elimination of an oceanic microplate segment by double subduction beneath the Australasian (PNG) and Pacific (Bismarck Sea) plates. A model is proposed which involves metasomatism in the back-arc asthenosphere by fluids or melts derived from the subducted slab at depths below ~150 km. Isotopic tracing studies in the ore deposit indicate that hydrothermal Pb and Sr were derived from a mixture of igneous and sedimentary sources, located within the Jurassic Om Formation (carbonaceous, pyritic siltstones). These fluids carried K, Rb, Mn, S, C02 and other components including Au and Ag into depositional zones in the overlying Cretaceous Chim Formation. Mass balance calculations indicate a significant magmatic involvement in the source of hydrothermal Pb, but show that Sr was largely derived by leaching of the sedimentary sequence. Analyses of precious metal abundances in unaltered intrusive rocks-and sediments show that neither rock-type represents a significantly gold-enriched protore, but evidence for the evolution of a volatile phase during crystallization of the magma suggests that Au and other elements may have been partitioned into a magmatic fluid. It is suggested that mixing between this fluid and warm, reduced, sulphide-rich groundwaters circulating in the Om Formation sediments resulted in rapid deposition of base metals, but gold was retained in solution as a bisulphide complex until precipitation at higher levels in the Chim Formation. Gold deposition was controlled by a combination of cooling, wallrock reaction, fluid mixing, and/or boiling, which resulted in destabilization of bisulphide complexes. A late influx of fresh magma into the parental magma chamber, probably triggered by tectonic activity, resulted in the emplacement of a suite of feldspar porphyry dykes, and the release of a final pulse of hydrothermal fluid. These fluids ascended along late faults and subsidiary structures, and rich deposits of gold were formed where they boiled or mixed with cool, descending groundwaters.
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"FDTD simulation on noble metal nanostructure." 2010. http://library.cuhk.edu.hk/record=b5894455.

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Woo, Kat Choi = 以時域有限差分法模擬貴金屬的納米結構 / 胡吉才.
Thesis (M.Phil.)--Chinese University of Hong Kong, 2010.
Includes bibliographical references (leaves 84-86).
Abstracts in English and Chinese.
Woo, Kat Choi = Yi shi yu you xian cha fen fa mo ni gui jin shu de na mi jie gou / Hu Jicai.
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- The Importance of Nanoscale Plasmonic Physics --- p.1
Chapter 1.2 --- The Driving Forces behind Plasmon Physics --- p.2
Chapter 1.3 --- Computation Method --- p.3
Chapter 1.4 --- Conclusion and Interesting Topics --- p.5
Chapter 2 --- The FDTD Mechanism --- p.6
Chapter 2.1 --- Algorithm Method --- p.6
Chapter 2.2 --- The Dielectric Function --- p.9
Chapter 2.2.1 --- Drude Model Definition --- p.9
Chapter 2.2.2 --- Drude Model Discretization --- p.10
Chapter 2.2.3 --- Discussion on Models --- p.11
Chapter 2.3 --- Accuracy and Stability --- p.12
Chapter 2.3.1 --- Numerical Dispersion --- p.12
Chapter 2.3.2 --- Courant Condition --- p.14
Chapter 2.4 --- Time Dependence of the Methods --- p.15
Chapter 2.5 --- Perfectly Matched Layer (PML) --- p.16
Chapter 2.5.1 --- Boundaries Problem --- p.16
Chapter 2.5.2 --- PML Main Theme --- p.17
Chapter 2.5.3 --- Different Types of PMLs --- p.20
Chapter 2.6 --- Conclusion: Simulation Laboratory --- p.20
Chapter 3 --- Software Comparison and Scaling Usage --- p.22
Chapter 3.1 --- Physical Quantity Interested --- p.22
Chapter 3.1.1 --- Cross-sections and Relation to Surface Plasmon Excitation --- p.23
Chapter 3.2 --- Mie Theory --- p.24
Chapter 3.2.1 --- Spherical Harmonics --- p.24
Chapter 3.2.2 --- Expressing the terms in Spherical Harmonics --- p.26
Chapter 3.2.3 --- Matching Boundaries --- p.27
Chapter 3.2.4 --- Scattering and Extinction Cross-sections --- p.28
Chapter 3.3 --- Software Used --- p.29
Chapter 3.3.1 --- Meep --- p.29
Chapter 3.3.2 --- Lumerical FDTD Solution --- p.30
Chapter 3.4 --- Machines Used for Comparison --- p.30
Chapter 3.5 --- Ease of Usage --- p.30
Chapter 3.5.1 --- Installation --- p.31
Chapter 3.5.2 --- Support --- p.32
Chapter 3.5.3 --- Parallel Computation --- p.33
Chapter 3.6 --- The Check Case Building --- p.33
Chapter 3.6.1 --- Monitor Measurement Related to Time for Simulation --- p.34
Chapter 3.6.2 --- Meep's Implementation --- p.34
Chapter 3.6.3 --- Total Field Scattering Field (TFSF) Source --- p.35
Chapter 3.6.4 --- Lumerical FDTD Solutions' Implement at ion --- p.36
Chapter 3.7 --- Comparison --- p.37
Chapter 3.7.1 --- Accuracy of the Programs --- p.37
Chapter 3.7.2 --- Time Needed for the Programs --- p.43
Chapter 3.8 --- Conclusion: How to Build Reasonable Running Cases --- p.46
Chapter 4 --- The Projects on Nanorods --- p.47
Chapter 4.1 --- Basic Understanding of Nanorods --- p.47
Chapter 4.1.1 --- Geometry Dependence on Localized Surface Plasmon Resonance in Au Nanorods --- p.48
Chapter 4.1.2 --- Plasmonic Coupling in Au Nanorod Dimers --- p.49
Chapter 4.2 --- Size-Dependent Scattering and Absorption Cross-sections for Au Nanocrystals --- p.51
Chapter 4.2.1 --- Measurement of Data --- p.51
Chapter 4.2.2 --- Setup of Simulation --- p.52
Chapter 4.2.3 --- Results and Conclusion --- p.54
Chapter 4.3 --- Angle-Dependent Plasmon Coupling in Au Nanorod Dimers --- p.56
Chapter 4.3.1 --- Setup of Experiment --- p.56
Chapter 4.3.2 --- Setup of Simulation --- p.57
Chapter 4.3.3 --- Results of Simulation --- p.59
Chapter 4.3.4 --- The Dipolar Model Discussion --- p.62
Chapter 4.3.5 --- Conclusion --- p.65
Chapter 4.4 --- Plasmon Coupling in Linear Au Nanorod Dimers --- p.65
Chapter 4.4.1 --- Experimental Results --- p.66
Chapter 4.4.2 --- Energy Dependent Plasmon Coupling of Au Nanorod Dimers --- p.67
Chapter 4.4.3 --- Dependency of the Plasmon Coupling on the Inter-particle Distance --- p.70
Chapter 4.4.4 --- Dependency of the Plasmon Coupling on the Head Shape of Au Nanocrystals --- p.74
Chapter 4.4.5 --- Coupling-induced Fano-Resonance in Au Nanorod Het- erodimers --- p.74
Chapter 4.4.6 --- Conclusion --- p.78
Chapter 4.5 --- Conclusion --- p.80
Chapter 5 --- Conclusion --- p.81
Bibliography --- p.84
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Zhang, Jia-Yuan, and 張家源. "A study on analysis of noble-metals waste liquid recycling technology." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/52265326648798220370.

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碩士
明新科技大學
化學工程與材料科技研究所
100
Abstract There are various noble-metals waste liquid recycle processing modes in the industry. Developments of economical effective noble-metals waste liquid resources in technology may help to solve effective noble-metals recyclings. Focus of this research has been laid upon the separation of noble-metals ions in the wastes liquid which contain noble-metals.Included in the research are the selection of proper ion exchange resins for the adsorption of noble-metals ions in noble-metals liquid wastes and the preparation of regenerants of various concentrations for resin desorption reactions to obtain the optimal conditions of separation processes of noble-metals liquid wastes. Appropriate operation conditions of noble-metals waste liquid recovery are available by the analysis of adsorption and desorption of ion exchange resins to provide recovery process references for cooperative enterprises for technique developments and industrial promotion. From experimental results that ion exchange resin may concentrate extremely the low concentration noble-metals liquid waste, and exchange ability of noble-metals ions with regenerant liquid concentration and pH to increase and improve the effect of resin desorption reactions of noble-metals ions and resin fully desorption reaction can be achieved in quick time.
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Li, Guang-Ya, and 李光亞. "Chelation Ion Chromatography - ICPMS Employing Bis(2-aminoethylthio)methylated Resin as Stationary Phase for Trace Noble Metal Analysis." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/14799485995466684709.

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Books on the topic "Noble metal analyses"

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McEachern, Rod J. Oxidation behaviour of noble-metal inclusions in used UOb2s nuclear fuel. Pinawa, Man: Research Chemistry Branch, Whiteshell Laboratories, 1997.

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Wilson, John W. Analysis of the physical atomic forces between noble gas atoms, alkali ions, and halogen ions. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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Beamish, F. E. Analysis of Noble Metals: Overview and Selected Methods. Elsevier Science & Technology Books, 2012.

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Wertsch, James V. How Nations Remember. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197551462.001.0001.

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How Nations Remember draws on multiple disciplines in the humanities and social sciences to examine how a nation’s account of the past shapes its actions in the present. National memory can underwrite noble aspirations, but the volume focuses largely on how it contributes to the negative tendencies of nationalism that give rise to confrontation. Narratives are taken as units of analysis for examining the psychological and cultural dimensions of remembering particular events and also for understanding the schematic codes and mental habits that underlie national memory more generally. In this account, narratives are approached as tools that shape the views of members of national communities to such an extent that they serve as co-authors of what people say and think. Drawing on illustrations from Russia, China, Georgia, the United States, and elsewhere, the book examines how “narrative templates,” “narrative dialogism,” and “privileged event narratives” shape nations’ views of themselves and their relations with others. The volume concludes with a list of ways to manage the disputes that pit one national community against another.
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Heim, Maria. Buddhism. Edited by John Corrigan. Oxford University Press, 2009. http://dx.doi.org/10.1093/oxfordhb/9780195170214.003.0002.

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Buddhism deals directly with the emotions as a chief concern of its doctrine and practice. The Buddha's core teaching of the Four Noble Truths begins with an emotional truth, that is, that life inevitably involves sorrow, suffering, and grief. Given their foundational concern with human vulnerability to suffering, it is not surprising that Buddhist traditions developed various systems of knowledge that explore human feeling with great subtlety, and advanced certain technologies to redress the pain in our emotional experience. In the various languages used by Buddhists, however, there is no term that corresponds exactly to the generic category “emotion,” and thus emotion as such is not theorized in Buddhist thought. This article reflects on how Buddhist thinkers have shaped human experience in distinctive ways through their analysis of affective life. It first discusses the Abhidhamma texts as the most systematic rendering of early Buddhist treatments of psychology. It then considers meditation techniques and their work with mental processes and examines the nuances of friendship and the social nature of other emotions.
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Book chapters on the topic "Noble metal analyses"

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Balcerzak, Maria. "Quantification of Noble Metals in Biological and Environmental Samples." In Handbook of Trace Analysis, 371–402. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-19614-5_13.

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LaBrecque, J. J., and P. A. Rosales. "The Application of P-32 and Sn-113 Radionuclides for the Determination of Noble Metals." In Advances in X-Ray Analysis, 255–59. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4757-9110-5_33.

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Legrand, Bernard, and Michel Guillopé. "Stability of the (110) Face in Noble Metals Analyzed within a Tight-Binding Scheme." In Atomistic Simulation of Materials, 361–67. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-5703-2_37.

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Carlos Jr., Narducci. "Casting Techniques: An Alternative for Producing Parts with Recycled Al in the Gravity Die Casting Process." In Noble Metals and Intermetallic Compounds - Recent Advanced Studies and Applications [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99983.

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This work applied the grain refinement technique by heterogeneous nucleation and precipitation hardening to investigate the effect of size and morphology of β-Fe particles on Al-Si alloys\' mechanical behavior Fe-critical, inoculated via Nb+B and heat-treated. The samples for the microstructural analyses were produced according to the standard mold, Test Procedure-1 (TP-1) and, analyzed by optical microscope with polarised light and filter plate and differential interference contrast (DIC) and by X-ray energy dispersive spectroscopy (XRD SEM) with EDS detector analyzer. The specimens for the mechanical tests were cast in a metal mold according to ASTM B108. The combined effect of manipulating the studied alloy Al10Si1Fe0.35Mg resulted in reduced and spheroidized β-Fe precipitates with improved mechanical properties in the material. Properties are similar to those achieved by commercially used alloys with engineering applications in structural and safety parts.
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Igarashi, Hiroshi, Hiroyuki Uchida, and Masahiro Watanabe. "Analyses of the preferential oxidation of carbon monoxide in hydrogen-rich gas over noble metal catalysts supported on mordenite." In Studies in Surface Science and Catalysis, 953–58. Elsevier, 2001. http://dx.doi.org/10.1016/s0167-2991(01)82244-8.

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Bakirhan, Nurgul K., Afzal Shah, and Sibel A. Ozkan. "Noble Metal Nanoparticles in Electrochemical Analysis of Drugs." In New Developments in Nanosensors for Pharmaceutical Analysis, 171–95. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-816144-9.00006-7.

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Musil, Stanislav, and Tomáš Matoušek. "Chemical vapor generation of transition and noble metals." In Vapor Generation Techniques for Trace Element Analysis, 91–128. Elsevier, 2022. http://dx.doi.org/10.1016/b978-0-323-85834-2.00011-2.

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Su, Xiaodi. "Noble Metal Nanoparticles as Colorimetric Probes for Biological Analysis." In Nanosensors, 183–214. CRC Press, 2010. http://dx.doi.org/10.1201/b10450-7.

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"The role of metal-support interaction on the oxidation of noble metals supported on cerium based oxides." In Electron Microscopy and Analysis 2001, 407–10. CRC Press, 2001. http://dx.doi.org/10.1201/9781482289510-100.

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Bychko, Igor B., Alexander A. Abakumov, Andrii I. Trypolskyi, and Peter E. Strizhak. "Catalytic properties of nanocarbon materials in reaction of selective hydrogenation of acetylene." In NEW FUNCTIONAL SUBSTANCES AND MATERIALS FOR CHEMICAL ENGINEERING, 280–95. PH “Akademperiodyka”, 2021. http://dx.doi.org/10.15407/akademperiodyka.444.280.

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The chapter presents the results of studies of the catalytic properties of nanocarbon materials based on carbon nanotubes and reduced graphene oxide in the hydrogenation of ethylene, acetylene and ethylene-acetylene mixture by molecular hydrogen at atmosphere pressure. The current state of scientific approaches to the creation of nanocarbon metal-free catalysts for the hydrogenation reactions in both liquid and gas phases is presented. A possible nature of active center of the hydrogenation reaction located on the surface of the nanocarbon material is discussed. It is shown that the catalytic activity of the nanocarbon materials is not associated with metal impurities. The correlation between the structural characteristics of carbon nanomaterials and their catalytic properties in the hydrogenation reactions of unsaturated hydrocarbons is demonstrated. A comparative analysis of the catalytic activity of nanocarbon materials and catalysts that contain noble metals in the hydrogenation reaction of acetylene is presented. Finally, the fundamental possibility of creating a nanocarbon catalyst for selective hydrogenation of acetylene in excess ethylene is shown.
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Conference papers on the topic "Noble metal analyses"

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Туресебеков, Арпай, Носир Шукуров, Хасан Шарипов, Роман Алабергенов, Абдували Зунунов, and Шухрат Шукуров. "Artificial waste as a new source of non-ferrous, noble, rare and toxic metals of Almalyk mining and metallurgical combine." In Mineralogical and technological appraisal of new types of mineral products. Petrozavodsk: Karelian Research Center of RAS, 2019. http://dx.doi.org/10.17076/tm13_4.

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The results of the integrated study of metal waste from Almalyk Mining-Metallurgical Plant (AMMP) are reported. Non-ferrous, noble and rare-metal reserves in waste from the dressing and metallurgical conversion of copper-molybdenum and lead-zinc deposits were evaluated. Analysis of the chemical composition and distribution of non-ferrous, noble, rare and toxic metals and their mode of occurrence in artificial waste from AMMP has shown that they are highly complex ores which could be used to increase metal production at AMMP.
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Smith, G. B., G. A. Niklasson, J. S. E. M. Svensson, and C. G. Granqvist. "Noble-metal-based transparent infrared-reflectors : Preparation and analysis of thin gold films." In 29th Annual Technical Symposium, edited by Carl M. Lampert. SPIE, 1985. http://dx.doi.org/10.1117/12.966295.

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Fontaine, H., D. Hureau, M. Groz, D. Despois, C. Louis, David G. Seiler, Alain C. Diebold, Robert McDonald, Amal Chabli, and Erik M. Secula. "Analysis of the Noble Metals on Silicon Wafers by Chemical Collection and ICPMS." In FRONTIERS OF CHARACTERIZATION AND METROLOGY FOR NANOELECTRONICS: 2011. AIP, 2011. http://dx.doi.org/10.1063/1.3657895.

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Kolat, Tom. "Thermocouple Testing Methods, Data Analysis and Reporting Calibration Results with Emphasis on Noble Metal Types." In NCSL International Workshop & Symposium. NCSL International, 2018. http://dx.doi.org/10.51843/wsproceedings.2018.26.

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Thermocouples are rugged, fast responding temperature sensors that very often cover large ranges of temperature. In addition, their economical affordability and ease of adaptation to a variety of configurations serve to increase their popularity and consequently the customer demand for traceable calibrations. Like all other measurement and test equipment, thermocouples, due primarily to their classification categories, exhibit a range of performances and accuracy expectations. This establishes the need for several methods of testing and analysis for effective, accurate result reporting with respect to the written standard and the temperature scale. This paper and its presentation discuss approaches employed to calibrate thermocouples and report their calibration results. It continues by illustrating some of the mathematics that can be used to furnish results on the calibration certificate. Examples of those applications with realistic thermocouple data are shown.
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Jakkaraju, Madhuri, and Vasudha Patri. "S. I. Engine Pollution Control Using Low-Cost Palletized Catalytic Converter." In ASME 7th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2004. http://dx.doi.org/10.1115/esda2004-58248.

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I. C. Engines consume large amounts of fossil fuel emitting harmful pollutants like carbon monoxide (CO), unburnt hydrocarbons (UBHC), and oxides of nitrogen (NOx). By using a catalytic converter (CC), the carbon monoxide, hydrocarbon emissions can be transformed into less harmful carbon dioxide (CO2) & water vapor (H2O). Currently available CC’s are using costly noble metals like platinum (pt), palladium (pd), rhodium (rh) etc., hence making them expensive. This paper deals with the use of low-cost palletized silver coated alumina as the catalyst element in a CC. In this study, alumina and silver were used in the ratio of 10:1. All tests have been conducted on a stationary S.I. Engine at a constant speed of 1500 r.p.m with and without CC. Also, the performance of the palletized CC in combination with promoters like Bismuth, Cerium and Lanthanum was tested which have shown better results than silver alone as the coating element. It has been experimentally determined that the CO emissions have dropped from 7.25 (% vol) to 3.03(% vol) and the HC values have reduced from 350 ppm to 190 ppm.
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Sharma, R. P., P. K. Khanna, D. Kumar, S. Kumar, and H. C. Pandey. "Development and analysis of noble-metal wire interconnections on Au thick film using parallel gap welding technique for MEMS and microsystems." In 2008 International Conference on Recent Advances in Microwave Theory and Applications (MICROWAVE). IEEE, 2008. http://dx.doi.org/10.1109/amta.2008.4763044.

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Shahinpoor, Mohsen. "Heart Assist Devices Equipped With Ionic-Polymeric-Platinum Composite Artificial Muscles." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0329.

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Abstract Reported are the characteristics of some newly developed ionic polymeric-noble metal composites such as Perfluorinated Sulfonic Acid-Platinum composites exhibiting low-voltage, electrically-controlled distributed large motion and sensing capability mimicking biological muscles. Reported further are modeling, design, fabrication and testing of a number of heart assist devices, i.e., LVAD (left ventricular assist devices) equipped with these muscles and activated by a computer-controlled voltage signal generator such as micro-processor controlled heart pace maker. The proposed designs include a pleated jacket made with such artificial muscles and worn by a weak heart with sleeves around the Aorta, Pulmonary and other pertinent veins such as the coronary veins around the heart. The model also presents an electrodynamic analysis of the synchronous contraction of the artificial muscles wrapped around the heart with the heart muscle itself similar to dynamic cardiomyoplasty.
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Chiu, Chuang-Pin, Peng-Yu Chen, and Che-Wun Hong. "Atomistic Analysis of Proton Diffusivity at Enzymatic Biofuel Cell Anode." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97136.

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This paper investigates the proton diffusion phenomenon between the anode catalyst and the electrode in an enzymatic bio-fuel cell. The bio-fuel cell uses enzymatic organism as the catalyst instead of the traditional noble metal, like platinum. The fuel is normally the glucose solution. The fuel cell is membrane-less and produces electricity from the reaction taken place in the organism. When the biochemical reaction occurs, the protons and electrons are released in the solution. The electrons are collected by the electrode plate and are transported to the cathode through an external circuit, while the protons migrate to the cathode by the way of diffusion. Unfortunately, protons are easy to dissipate in the solution because the enzyme is immersed in the neutral electrolyte. It is an important issue of how to collect the protons effectively. In order to investigate the diffusion process of the protons, a molecular dynamics simulation technique was developed. The simulation results track the transfer motion of the protons near the anode. The diffusivity was evaluated from the trajectory. The research concludes that the higher the glucose concentration, the better the proton diffusivity. The enzyme promotes the electrochemical reaction; however, it also plays an obstacle in the proton diffusion path.
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Oncescu, Vlad, and David Erickson. "A Microfabricated Enzyme-Free Glucose Fuel Cell for Implantable Devices." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62893.

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In the past decade the scientific community has showed considerable interest in the development of implantable medical devices. Such devices have low power requirements and can potentially be operated through fuel cells using reactants present in the body such as glucose and oxygen instead of non-rechargeable lithium batteries. In this paper we present a thin, enzyme-free fuel cell with high current density and good stability at a current density of 10μA cm−2. The fuel cell uses a stacked electrode design in order to achieve glucose and oxygen separation. In addition, it uses a porous carbon paper support for the anodic catalyst layer which reduces the amount of platinum or other noble metal catalysts required for fabricating high surface area electrodes with good reactivity. The peak power output of the fuel cell is approximately 2μW cm−2 and has a sustainable power density of 1.5μW cm−2 at 10μA cm−2. An analysis on the effects of electrode thickness and inter electrode gap on the maximum power output of the fuel cell is also performed.
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Ruan, Minzhi, Yingzi Liu, Jinyao Zhang, Minhang Sun, and Xuelian Liu. "Commissioning and Cold Test of HLLW Vitrification Plant of China." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-93047.

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Abstract Prior to radioactive operations, the Vitrification Plant of China (VPC) will implement a cold-commissioning plan or strategy that will include functional test, water test, simulant test and glass pouring test to not only test the process systems, auxiliary systems and melter performance, but also allow operators to increase facility operating experience and be familiar with remote handling in hot cells before introducing radioactive material into the plant. The process technique used is based on the German liquid fed ceramic-lined electric waste glass melter (LFCM) designed to process high level liquid waste (HLLW) containing highly noble metals (Ru, Rh, Pd). Several batches of simulants tests are performed and the operation data including melter temperature and initiating procedure are analyzed. A maximum process rate is determined according to the applied process parameters including the high operating temperature. And in different operating modes, including idling mode and operating mode, the effect of different feed rates on the formation of the cold cap and the temperature in different areas of the melter are investigated. The paper gives an overview about the current status of the VPC plant. The strategy of commissioning and cold test operations are described in detail.
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