Дисертації з теми "Platinum-zinc"
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Tsotsoros, Samantha. "Platinum Complexes and Zinc Finger Proteins: From Target Recognition to Fixation." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/610.
Повний текст джерелаKwok, Chi-chung. "Functional light-emitting materials of platinum, zinc and boron for organic optoelectronic devices." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B34617693.
Повний текст джерела郭子中 and Chi-chung Kwok. "Functional light-emitting materials of platinum, zinc and boron for organic optoelectronic devices." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B34617693.
Повний текст джерелаLin, Yongyue, and 林勇躍. "Luminescent platinum(II), copper(I), silver(I) and zinc(II) complexes with functional pyridyl and arylacetylide ligands: structures, spectroscopic properties and applications." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31243381.
Повний текст джерелаLin, Yongyue. "Luminescent platinum(II), copper(I), silver(I) and zinc(II) complexes with functional pyridyl and arylacetylide ligands : structures, spectroscopic properties and applications /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25155325.
Повний текст джерелаRao, Harita. "Metal containing peptides as specific DNA binders." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://hdl.handle.net/11858/00-1735-0000-0028-86AC-9.
Повний текст джерелаGrant, Ann W. "Surface studies of model catalysts using metal atoms and particles on ZnO(0001)-Zn and -O and TiO₂(110) /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/8499.
Повний текст джерелаDaniel, A. Gerard. "Zinc Environment in Proteins: The Flexible and Reactive Core of HIV-1 NCp7 and The Inhibitory Site of Caspase-3." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3263.
Повний текст джерелаAtilio, Anzellotti I. "Study Of Covalent And Non-Covalent Interactions In Ternary Systems Involving: Metal/DNA-RNA/Protein, Where Metal = Platinum(II), Palladium(II)." VCU Scholars Compass, 2007. http://scholarscompass.vcu.edu/etd/1164.
Повний текст джерелаZakhtser, Alter. "Synthesis and Reactivity of PtZn Nanostructures and Nanocrystals for Heterogeneous Catalysis Applications." Thesis, Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=http://theses-intra.upmc.fr/modules/resources/download/theses/2019SORUS434.pdf.
Повний текст джерелаThe purpose of this thesis was to explore the surface chemistry of platinum-zinc bimetallic systems, and their catalytic activity in the oxidation reaction of CO. The research on this bimetallic system was carried out on two fronts: a surface science study of the model system, a discontinuous ZnO single layer epitaxied on Pt(111), using scanning tunneling microscopy and synchrotron radiation near ambien pressure x-ray photoemission, and a more “nanomaterial science” oriented study of the same bi-metallic system, using complex colloidal synthesis chemistry, transmission and scanning electron microscopy, and finally laboratory XPS. First, a model surface consisting of a ZnO monolayer film supported on Pt(111) was fabricated under ultra-high vacuum conditions. Its surface chemistry was explored by STM and then by synchrotron radiation NAP-XPS under operando conditions. We were able to prove that this system was indeed a typical case of inverse catalysis. Synergetic effects due to the presence of both materials were well seen, but only at low temperatures (up to 410 K). Beyond that temperature, mass transport effects prevent the reactivity of the ZnO/Pt(111) and Pt(111) surfaces from being compared. We have shown that reaction intermediates must be formed in the border area between ZnO and platinum, when the ZnO film is discontinuous. We have highlighted the key role played by the hydroxyls present only ion the ZnO patches, which are due to the dissociation of H2 or H2O from the residual atmosphere on the platinum patches. In particular, we have detected by NAP-XPS the presence of a carboxyl species (due to the association of OH with CO), which precedes the desorption of CO2. Above 410 K, a formate appears, and the latter species is likely a spectator in the CO oxidation process. The transfer of the knowledge accumulated in the preceding surface science and model catalysts studies, to the more realistic case of nanocrystals of the PtZn alloy, while it helped identify some common phenomena, it also shows its limitations. In fact the NC coated with their oleylamine ligands have characteristics that UHV model surfaces do not possess, due to the NC fabrication process itself: we have found spectroscopic hints of the presence of water (possibly a byproduct of the reaction, arising from a condensation reaction between the ketone and the amine); in addition, a capping of the platinum surface by H atoms, is, at present, explanatory of many observed phenomena. Finding the experimental conditions to produce bimetallic nano-alloys from two metal-acac2 precursors was a daunting task, much more than that of physically depositing a thin film on a UHV monocrystal. Our efforts were rewarded as we were able to produce PtZn alloy NCs. This one of the main points of the present study. The presence of Pt(acac)2 prevents zinc (whose from being fully oxidized to ZnO, which is the case when Zn(acac)2 alone is present in oleylamine. Monochromatized XPS shows that zinc makes an alloy with platinum, where it remains metallic, while another fraction is under the form of ZnO. It is not completely clear whether two reaction channels are in competion (PtZn alloying versus Zn oxidation by water), or Zn is oxidized afterwards, i.e. after exposure to air. The alloyed NCs have been studied in detail by advanced methods of electron microscopy (including under operando conditions), diffraction and EDS. Unlike the case of the surface model where the STM images were particularly telling, we do not have at this stage of the study an exact model of the interface between the metal alloy and the zinc oxide that surrounds it. On the other hand, we know that the core of the NCs is occupied by the PtZn alloy, and that the outer planes are identical to those of pure platinum. [...]
VALADE, FARGES LYDIE. "Conducteurs et supraconducteur moleculaires : complexes de metaux de transition a ligand soufre." Toulouse 3, 1987. http://www.theses.fr/1987TOU30008.
Повний текст джерелаMI-CHIEN, LEE, and 李彌堅. "A Study on Zinc-Platinum Battery." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/28243415998461023187.
Повний текст джерела大葉大學
機械工程研究所碩士在職專班
94
Batteries are devices that transform chemical energy into electrical energy. Because of the portability, they are widely applied in various fields. This research focus on analyzing the performance of homemade Zinc-Platinum Batteries by using Arbin full cell test Instruments. During the process of experiments, the proportions and formula of KOH and NH4Cl in the electrolyte solutions are altered to change the distance between the positive electrode and the negative electrode as well as the amount of the current load. By calculating the consuming amount of zinc electrode, we observe the amount of hydrogen produced on the electrode. The results of the experiments indicate that the maximum current a Zinc- Platinum Battery can offer is 1400mA and the current density 166mA/cm2。The concentration of KOH and NH4Cl is in proportion to the battery performance. The best proportion of the electrolyte solutions is when the concentration of KOH reaches 3M, NH4Cl 6M. The distance of between the positive electrode and the negative electrode shows an inverse proportion to the performance. The load of the battery also shows an inverse proportion to the hydrogen amount produced on the electrode. The effectiveness of NH4Cl working to repress zinc corrosion indicates a direction proportion to its concentration. When the concentration of NH4Cl reaches over 5M, it makes poor performance of the battery. The development of a Zinc- Platinum Battery is still at the beginning stage. Its performance is between an Alkaline Battery and Carbon Zinc Battery. It is our hope that with this research, more interests will be aroused and more studies will be conducted to make Zinc-Platinum Batteries meet the highly demanded electricity of 3C products and become popular in the market.
Guerra, Eduard. "Evaluation of zinc electrodeposition kinetics from acidic zinc sulfate solutions using a UPD modified platinum substrate." Thesis, 2003. http://hdl.handle.net/2429/16770.
Повний текст джерелаApplied Science, Faculty of
Materials Engineering, Department of
Graduate
Thimmaiah, Srinivasa [Verfasser]. "Synthesis, characterization, and phase relations of zinc-rich phases in the binary systems platinum-zinc and nickel-zinc / vorgelegt von Srinivasa Thimmaiah." 2006. http://d-nb.info/979662508/34.
Повний текст джерелаTsai, Wan-Chuan, and 蔡宛娟. "Preparation and Photocatalytic Activity of Zinc Oxide-Titania Photocatalyst Doped with Platinum." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/55375852229567115765.
Повний текст джерела國立中興大學
化學工程學系所
103
In this thesis, the purpose is to study about the photocatalytic activity of titania doped with 3 wt% of zinc oxide and 1 wt% of platinum. The preparation of the photocatalyst is using the sol- gel method and depositing platinum by photoreduction. The parameters of catalyst preparation include amount of water, kinds of solvent, kinds and ratios of disperant, weights of zinc oxide addition, loading of platinum, and sources of UV light for photoreduction of platinum. The photocatalytic activity of the catalyst is tested by photodegradation of methyl orange using quartz glass reactor under UV light illumination. Operating conditions in photocatalytic reaction included initial concentration of methyl orange solution, amounts of catalyst, wavelength of illumination and photodegradation of methylene blue. The results indicated that using the molar ratio 90 of DI water/Titanium isopropoxide with the disperant of sodium dodecylbenzensufonate to prepare titania which doped with 3 wt% zinc oxide and 1 wt% platinum can increase the photocatalytic activity effectively. Under 150 minutes of the UV illumination, the conversion of photodegration of methyl orange solution is about 65.5%. The photodegradation of the methyl orange solution is also performed by the catalyst Pt(1)(ZnO(3)/TiO2(97))(99) under irradiation of UV light (365 nm) and the conversion of degradation is 70.6% in 150 minutea. Using the same catalyst to degradate the methylene blue, the conversion can reach 74.4%. The conversion for the degradation of methyl orange can reach 93.5% when using 1 g of Pt(1)(ZnO(3)/TiO2(97))(99) catalyst.
Anzellotti, Atilio I. "Study of covalent and non-covalent interactions in ternary systems involving : metal/DNA-RNA/protein, where metal = Pt(II), Pd(II) /." 2007. http://hdl.handle.net/10156/1824.
Повний текст джерелаHuang, Hsin Wen, and 黃信文. "Study of mechanism of direct ammonia fuel cell by using pulse-electrodeposition fabricated platinum and platinum-zinc nano-clusters on glass carbon RDE." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3725s6.
Повний текст джерела長庚大學
化工與材料工程學系
106
In this experiment, the effect of the anode catalyst of direct ammonia fuel cell on the electrochemical oxidation reaction of ammonia was discussed. The metal clusters were deposited on the glassy carbon electrode by means of electric pulse deposition to observe the reaction to ammonia. A direct ammonia fuel cell(DAFC), platinum catalyst for ammonia reaction may be the best, while used as an anode catalyst. There is a poison phenomenon, a nitrogen atom in the process of formation of nitrogen oxide is adsorbed on the catalyst surface, resulting in low current density. The use of electrodeposition of zinc metal on platinum metal, may change the surface of the electronic properties and thus affect the surface - molecular interaction.
Chen, Yan Bo, and 陳彥博. "Review literatures study of catalytic activity of direct ammonia fuel cell anode catalyst by using electrodeposition Zinc modified to Platinum electrode." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/w24k6s.
Повний текст джерела長庚大學
化工與材料工程學系
105
Direct ammonia fuel cell by using ammonia liquid fed in comparison to hydrogen PEM fuel cell and direct methanol fuel cell, DAFC has higher conversion efficiency than PEMFC, with good theoretical capacity (4750A/kg) and OCV (1.17V). DAFC does not produce carbon-containing compounds. Platinum as anode catalyst is the most effective electro-catalyst towards ammonia oxidation for a direct ammonia fuel cell (DAFC), but there is a poison phenomenon. In the oxidation process nitrogen atoms are not easy to desorb the catalyst surface, resulting in retardation of voltage current density. To enhance the catalytic activity of platinum catalyst and reduce the poison phenomenon, platinum catalyst must be modified with catalyst metals, in enhancing the catalytic performance activity. The use of electrodeposition of zinc metal on platinum metal, may change the surface of the electronic properties and thus affect the surface - molecular interaction.
"Oligo(phenylene-vinylene) terpyridine ligands and their ruthenium(II), platinum(II) and zinc(II) complex systems: Synthesis, photophysical and photochemical properties." Tulane University, 2004.
Знайти повний текст джерелаacase@tulane.edu
Azevedo, Catarina Isabel Costa. "A importância dos minerais na Indústria farmacêutica e cosmética." Master's thesis, 2018. http://hdl.handle.net/10284/7354.
Повний текст джерелаA mineral is defined based on its chemical constitution and crystalline structure, and to qualify as such, should encompass a combination of these properties. It is a natural substance of inorganic origin. Minerals are essential for our health because their presence is key to cellular activity. Within the scope of this dissertation, it was noticed that at the level of the pharmaceutical industry, the minerals are essentially as active substances of the pharmaceutical formula, and can thus be used in the prevention and treatment of several pathologies, which may or may not be related to the lack of diets. Iron, for example, is used in the treatment of deficiency anemia in this mineral, calcium prevents the onset of osteoporosis, while magnesium deficiency is related to cardiovascular diseases, diabetes mellitus type II, among others. On the other hand, platinum is applied in the treatment of several cancers, zinc in the therapy of Wilson's disease and lithium in bipolar disease. In the cosmetics industry minerals are also of great importance and can be used as active substances or as excipients in the treatment or prevention of various skin conditions, and personal care products which are used by consumers as part of their daily activities of hygiene and beauty. Acne and seborrheic dermatitis are two examples of conditions that affect the skin and in which the minerals are used as part of the treatment, respectively by the use of zinc and selenium compounds. However, although the minerals have already been exploited since prehistory, they are still the subject of several studies, in order to study new ways of applying them both in the pharmaceutical industry and in cosmetics.