Gotowe bibliografie tematyczne / Carbonyl-Iron Electrode

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Gotowa bibliografia na temat „Carbonyl-Iron Electrode”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Carbonyl-Iron Electrode"

Yeo, Joey, Mun Hon Cheah, Mark I. Bondin i Stephen P. Best. "X-Ray Spectroscopy and Structure Elucidation of Reactive Electrogenerated Tri-iron Carbonyl Sulfide Clusters". Australian Journal of Chemistry 65, nr 3 (2012): 241. http://dx.doi.org/10.1071/ch11484.

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The design and operation of electrosynthesis cells for generation of samples for X-ray absorption spectroscopy are described. Optimization of continuous-flow methods allows the generation of highly reducing species, which may be combined with spectroscopic validation of the composition of the electrogenerated solution. It is shown that the large sample volume (10 mL) of the 1–10 mM (in the absorbing element) solution required for such experiments can be reduced to ~100 μL using a strategy in which the in situ electrosynthesis cell is amenable to freeze-quenching and transfer to a beamline cryostat. The working electrode in this case doubles as the X-ray absorption spectroscopy sample cell. The application of these techniques is illustrated by the reduction chemistry of Fe3S2(CO)9, 3Fe2S. Spectra recorded in the near-edge region confirm that quantitative preparation of samples of 3Fe2S, 3Fe2S1– and 3Fe2S2– can be prepared by either approach, but samples of a more reduced form, identified as [Fe3S(CO)9]2–, could only be generated using continuous-flow electrosynthesis techniques. Differences in the structural chemistry of the 3Fe2S0/1–/2– redox series were examined from the perspective of their near-edge spectra and the structures of 3Fe2S1– and 3Fe2S2– forms were deduced by a combination of computational (density functional theory), spectroscopic and X-ray absorption fine-structure analyses. These show that addition of the first electron is predominantly localized in one of the Fe–Fe bonds; cleavage of the Fe–Fe bond by addition of a second electron to the Fe–Fe antibonding orbital is associated with a more substantial rearrangement of the molecule. The reduced compounds have structural similarities to the reduced dithiolate-bridged di-iron hexacarbonyl compounds and this is related to the weak electrocatalytic proton reduction exhibited by Fe3S2(CO)9. The methods described provide a strategy for the collection and analysis of experimental data directed towards structure elucidation of redox-activated solution-state complexes.

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Manohar, Aswin K., Chenguang Yang, Souradip Malkhandi, Bo Yang, G. K. Surya Prakash i S. R. Narayanan. "Understanding the Factors Affecting the Formation of Carbonyl Iron Electrodes in Rechargeable Alkaline Iron Batteries". Journal of The Electrochemical Society 159, nr 12 (2012): A2148—A2155. http://dx.doi.org/10.1149/2.021301jes.

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H. Abbar, Ali, Jameel Y. Abdul-Ridha i Sameer H. Kareem. "Electrolytic preparation of Iron powder with particle Size Less than 106 pm". Iraqi Journal of Chemical and Petroleum Engineering 8, nr 1 (30.03.2007): 51–57. http://dx.doi.org/10.31699/ijcpe.2007.1.8.

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Avery large numbers of articles are made by powder metallurgical methods using electrolytically reduced metal powders. Iron powder is one of these powders which play an important role in this field. Its preparation by electrolytic method is economic in comparison with the traditional methods (Atomization and carbonyl processes). An electrochemical cell consisting of two electrodes (stainless steel cathode and iron anode, 99.9%) was used to study the electrolytic preparation of iron powder with particle size less than 106µm directly as powde1y form. Ferrous sulphate electrolyte was used containing sodium chloride as a stabilizing agent. The produced powder was thoroughly washed with an acidified distilled water and absolute ethanol, then dried under an inert atmosphere at 80°C, and classified by screening. Samples of prepared powder were taken to determine their purity by atomic absorption. The effects of current density, metal ion concentration, sodium chloride concentration, PH, and electrolysis time on the weight percent of iron powder less than (106µm), yield and current efficiency were studied. It was found that an iron powder with particle size less than 106µm can be prepared at a weight percent of iron powder less than I06µm (89.7%) and current efficiency of 71% using cathodic current density of 0.1 A/cm3 and electrolysis time equal to 1 hr. The prepared powder having an apparent density of (3.24 gm/cm3 and real density of 7.39 gm/cm3 with specific surface area of 238 X 103 cm2/gm. Its average particle size was 75 pm and its purity was 99.14%

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Pascu, Gabriel, Octavian Madalin Bunoiu i Ioan Bica. "Magnetic Field Effects Induced in Electrical Devices Based on Cotton Fiber Composites, Carbonyl Iron Microparticles and Barium Titanate Nanoparticles". Nanomaterials 12, nr 5 (7.03.2022): 888. http://dx.doi.org/10.3390/nano12050888.

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This work consists in the process of preparing magnetic active composite materials based on cotton fibers, iron carbonyl microparticles and barium titanate nanoparticles, and the electrical devices manufactured with them. For different compositions of the aforementioned ingredients, three such composites are manufactured and compacted at constant pressure between two electrodes. In the absence and in the presence of a magnetic field, using an RLC bridge, magnetocapacitive, magnetoresistive and magnetopiezoelectric effects are highlighted in the custom fabricated devices. It is shown that these effects are significantly influenced by the composition of the materials. Based on the model elaborated in this paper, the mechanisms that contribute to the observed effects are described and the theoretical predictions are shown to agree with the experimental data. The obtained results can be used in the assembly of hybrid magnetic active composites, which are low cost, ecological and have other useful physical characteristics for applications.

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Bica, Ioan, i Eugen Mircea Anitas. "Electrical devices based on hybrid membranes with mechanically and magnetically controllable, resistive, capacitive and piezoelectric properties". Smart Materials and Structures 31, nr 4 (18.02.2022): 045001. http://dx.doi.org/10.1088/1361-665x/ac4ea7.

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Abstract Cotton fabric based membranes containing carbonyl iron microparticles with and without barium titanate nanoparticles (nBaTiO3) are fabricated. The hybrid membranes (hMs) are inserted between two copper electrodes, reinforced with glass fiber and epoxy resin. The resulted assembly is introduced in a silicone rubber sheath, and plane electrical devices (EDs) are obtained. Here, it is shown that using nBaTiO3, the EDs are characterized by resistive, capacitive and piezoelectric functions which have the property of being controllable in a field of mechanical forces, in a magnetic field or a combinations of the two. This is revealed by measuring the electrical resistance, capacitance and voltage at the output terminals of the devices. The electric voltage generator property of the devices is conferred by the presence of nBaTiO3. These effects allow us to conclude that the hMs offer the possibility of manufacturing low-cost and ecological EDs for various applications such as vibration, magnetic field and mechanical deformations sensors, electric generators etc.

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Glavan, Gašper, Inna A. Belyaeva, Kevin Ruwisch, Joachim Wollschläger i Mikhail Shamonin. "Magnetoelectric Response of Laminated Cantilevers Comprising a Magnetoactive Elastomer and a Piezoelectric Polymer, in Pulsed Uniform Magnetic Fields". Sensors 21, nr 19 (24.09.2021): 6390. http://dx.doi.org/10.3390/s21196390.

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The voltage response to pulsed uniform magnetic fields and the accompanying bending deformations of laminated cantilever structures are investigated experimentally in detail. The structures comprise a magnetoactive elastomer (MAE) slab and a commercially available piezoelectric polymer multilayer. The magnetic field is applied vertically and the laminated structures are customarily fixed in the horizontal plane or, alternatively, slightly tilted upwards or downwards. Six different MAE compositions incorporating three concentrations of carbonyl iron particles (70 wt%, 75 wt% and 80 wt%) and two elastomer matrices of different stiffness are used. The dependences of the generated voltage and the cantilever’s deflection on the composition of the MAE layer and its thickness are obtained. The appearance of the voltage between the electrodes of a piezoelectric material upon application of a magnetic field is considered as a manifestation of the direct magnetoelectric (ME) effect in a composite laminated structure. The ME voltage response increases with the increasing total quantity of the soft-magnetic filler in the MAE layer. The relationship between the generated voltage and the cantilever’s deflection is established. The highest observed peak voltage around 5.5 V is about 8.5-fold higher than previously reported values. The quasi-static ME voltage coefficient for this type of ME heterostructures is about 50 V/A in the magnetic field of ≈100 kA/m, obtained for the first time. The results could be useful for the development of magnetic field sensors and energy harvesting devices relying on these novel polymer composites.

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Sundar Rajan, A., M. K. Ravikumar, K. R. Priolkar, S. Sampath i A. K. Shukla. "Carbonyl-Iron Electrodes for Rechargeable-Iron Batteries". Electrochemical Energy Technology 1, nr 1 (26.01.2015). http://dx.doi.org/10.2478/eetech-2014-0002.

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AbstractNickel-iron and iron-air batteries are attractive for large-scale-electrical-energy storage because iron is abundant, low-cost and non-toxic. However, these batteries suffer from poor charge acceptance due to hydrogen evolution during charging. In this study, we have demonstrated iron electrodes prepared from carbonyl iron powder (CIP) that are capable of delivering a specific discharge capacity of about 400 mAh g−1 at a current density of 100 mA g−1 with a faradaic efficiency of about 80%. The specific capacity of the electrodes increases gradually during formation cycles and reaches a maximum in the 180th cycle. The slow increase in the specific capacity is attributed to the low surface area and limited porosity of the pristine CIP. Evolution of charge potential profiles is investigated to understand the extent of charge acceptance during formation cycles. In situ XRD pattern for the electrodes subsequent to 300 charge/discharge cycles confirms the presence of Fe with Fe(OH)2 as dominant phase.

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"Electrochemical Properties of Carbonyl Iron Electrodes for Iron-Air Batteries". ECS Meeting Abstracts, 2011. http://dx.doi.org/10.1149/ma2011-02/7/303.

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"Mechanism of Formation of Carbonyl Iron Electrodes in Alkaline Batteries". ECS Meeting Abstracts, 2012. http://dx.doi.org/10.1149/ma2012-02/5/371.

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"Effect of Various Additives on the Efficiency and Rate Capability of Carbonyl Iron Electrodes for Iron - Air Batteries". ECS Meeting Abstracts, 2012. http://dx.doi.org/10.1149/ma2012-01/7/366.

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Części książek na temat "Carbonyl-Iron Electrode"

Ouyang, Chuke, Jile Jiang, Lei Shan, Wenpeng Jia, Yonggang Meng i Yu Tian. "Influence of Friction on Magnetorheological Effect". W Magnetic Soft Matter, 229–49. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839169755-00229.

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The magnetorheological effect (MR effect) used to be believed to be dominated by magnetic dipole interactions among carbonyl iron particles. In this chapter, friction as an important factor is introduced in the MR effect. The shear history effect of MR fluids was ascribed to not yet relaxed pre-formed chain/column structure. At certain conditions, the stick-slip effect in MR fluids could be found, which is similar to the general observation in general sliding friction. The influence on rheology of MR fluids from the lubrication performances of the carrier fluid was fully demonstrated. A better lubrication of base oil usually led to a decreased shear strength of the MR fluid under the same field strength. The ‘cross point’ of the damping factor (tan δ) of the MRF was found, which suggested two kinds of friction influencing MR effects. The shear thickening of the MR fluid and its tribological mechanism was also introduced. All these results clearly indicated that friction played important roles in the magnetorheology by affecting the force transmission at the particle–particle interface and particle–electrode interface.

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Park, Yu-Jin, i Seung-Bok Choi. "Mechanical Properties of Soft Composites Fabricated from Two Different Magnetorheological Materials". W Magnetic Soft Matter, 107–18. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839169755-00107.

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In this chapter there is a description of a soft composite that is fabricated from two different magnetorheological materials: magnetorheological elastomer (MRE) and magnetorheological fluid (MRF) and how its field-dependent mechanical property is experimentally investigated. Initially, an MRE skin is manufactured with two different void patterns of the rhombus and rectangular type. Then, the soft composite is fabricated by filling MRF into the voids and bonding the upper/lower MRE skins. Prior to testing, a scanning electron microscopy (SEM) image is taken to check the uniform dispersion of the carbonyl iron particle (CIP) of the MRE skin and observe the chain-like columns of the MRF due to the magnetic field. Subsequently, the force–displacement curve is directly measured from the tensile machine with three different design parameters: different void patterns of the MRE skin, CIP concentration of the MRE skin and the existence of the MRF in the void. It is identified from a comparative work among three different design parameters that the effect of the void pattern to the stiffness change (or effective Young's modulus (EYM)) is small, while the effect of the CIP concentration and MRF is significant. This result indicates that an appropriate composite showing a desirable tuning range of the stiffness can be fabricated using two different magnetorheological materials.

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Streszczenia konferencji na temat "Carbonyl-Iron Electrode"

Cheng, H. B., L. Zuo, Q. J. Zhang i N. M. Wereley. "Aqueous Magnetorheological Suspensions of Composite Carbonyl Iron Particles". W ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2010. http://dx.doi.org/10.1115/smasis2010-3899.

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Aqueous magnetorheological (MR) suspensions of composite carbonyl iron particles (CCIPs) were prepared with carbonyl iron particles and an organic reagent coating (N-polyether, N, N, N,-acetyloxy) 2, 6-aminion-1, 3, 4-thiadiazole dimer (EAMTD). The properties of the CCIPs, including morphology, structure, and magnetic behaviors, were characterized using scanning electron microscopy (SEM) and a vibrating sample magnetometer (VSM). The MR properties of the aqueous MR suspensions were analyzed via a strain-controlled parallel disk rheometer equipped with a magnetic field source. The results show that the stability and redispersibility of the aqueous MR suspensions were greatly improved, and the yield stress is influenced by the EAMTD coating layer of the CCIPs.

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Zhuravlev, Victor A., Valentine I. Suslyaev, Evgeny Yu Korovin i Alexandra A. Pavlova. "Electromagnetic characteristics of double-layer composite materials on basis of carbonyl iron". W 2014 15th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM). IEEE, 2014. http://dx.doi.org/10.1109/edm.2014.6882466.

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Takeguchi, M., M. Shimojo, K. Mitsuishi, M. Tanaka i K. Furuya. "Characterization of magnetic nanostructures fabricated by electron beam induced-chemical vapor deposition with iron carbonyl gas". W Digest of Papers. 2004 International Microprocesses and Nanotechnology Conference, 2004. IEEE, 2004. http://dx.doi.org/10.1109/imnc.2004.245723.

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