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Showing 1 to 20 of 85 for “"electrocatalyst"”.
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Model electrode structures for studies of electrocatalyst degradation
… performance and reduce the noble metal loading. Electrocatalyst degradation is believed to occur by four mechanisms; particle sintering (Ostwald ripening and migration and coalescence), carbon corrosion and catalyst dissolution. Increasing catalyst layer durability is becoming a major challenge …
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So<sub>2</sub> Adsorption On Carbon-Supported Pt Electrocatalyst
… that the primary accumulation was on the Pt/C electrocatalysts. Therefore, adsorption isotherms were obtained for SO<sub>2</sub> on Pt/C electrocatalysts.</p> <p>Accumulations are quantified with material balances on the inlet and the outlet SO<sub>2</sub> stream during OCV. SO<sub>2</sub> …
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Preparation, characterisation and evaluation of core-shell electrocatalyst for PEMFCs
… 1 introduces the PEM fuel cells, ORR electrocatalysts and the preparation and<br/>characterisation of core-shell type electrocatalysts. The experimental techniques,<br/>procedures and apparatus used for this work will be described in Chapter 2. The<br/>mechanism of the synthetic …
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Rational Design of Trimetallic Electrocatalyst for Electrochemical Overall Water Splitting
Noble-metal-free bifunctional electrocatalysts for overall water splitting have attracted increasing attention due to their earth-abundancy and high efficiency. However, current bifunctional electrocatalysts suffer from the disadvantages of the complex synthetic process, low yield, or low energy …
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MAX phases as an electrocatalyst support material: a DFT study
… They do however show signs of being good electrocatalyst support materials.
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Comprehensive Characterization of Nickel-Based Metallic Foams and Their Applications as Electrocatalyst Materials
… metallic foams as active electrodes and as electrocatalyst support materials. A comprehensive characterization of Ni and multi-component Ni-based foams is presented and includes the analysis of their structural, chemical, and electrochemical properties. Several materials and surface science …
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SiC and B₄C as electrocatalyst support materials for low temperature fuel cells
Supported nano-catalyst technologies are key for increasing the catalyst utilisation and achieving economically feasible platinum metal loadings in hydrogen polymer electrolyte fuel cells (PEFCs). High surface area carbons are commonly utilised as support materials for platinum due to low cost, …
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Cathode Electrocatalyst Selection and Catalyst Deposition for a Direct Borohydride/Hydrogen Peroxide Fuel Cell
Made available in DSpace on 2017-07-06T18:48:17Z (GMT). No. of bitstreams: 3 Gu_Lifeng_MS.pdf: 1772067 bytes, checksum: 6152bb6d7c88011948e222d3fadd99f3 (MD5) Gu_Lifeng_MS_ABS.pdf: 57407 bytes, checksum: 8d4cb6c31a9f53ba045b5d7503558df2 (MD5) license.txt: 4813 bytes, checksum: …
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Investigation of a novel electrocatalyst for hydrogen peroxide reduction and its application to sensing and biosensing.
… electrochemical detection. In this work, a novel electrocatalyst for the reduction of hydrogen peroxide was employed as the foundation for the development of an electrochemical biosensor for glucose determination. Critical to this development was to understand the nature of the novel catalytic …
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Iridium oxide supported on antimony-doped tin oxide as an electrocatalyst for the oxygen evolution reaction
… The ex-situ OER performance of the synthesised electrocatalysts was evaluated using the rotating disk electrode technique. Using X-ray photoelectron spectroscopy (XPS) and high-resolution transmission scanning electron microscopy (HR-STEM), the physical properties of the synthesised IrOₓ/ATO …
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Evaluation of metal nitrides and borides as alternative electrocatalyst support materials for polymer electrolyte fuel cells
… and shut-down of the fuel cell. Corrosion of the electrocatalyst support materials has numerous adverse effects on the performance of the fuel cell, such as weakening of metal-support interaction which results in Pt detachment, dissolution and sintering. Hence, the electrochemical active surface …
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Study of TaC Supported Ir-Based Oxygen Evolution Reaction Electrocatalysts Synthesized by Surfactant-Mediated Method
… support for oxygen evolution reaction (OER) electrocatalysts were investigated. It was first ball milled for 7 and 14 days in order to decrease the particle size and increase the surface area. The larger the surface area of a support, the better the dispersion of the electrocatalyst on the …
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Synthesis and Electrocatalytic Properties of Structure Engineered First-Row Transition Metal Derivatives
… to both water electrolysis and fuel cells is the electrocatalyst. Currently, the noble metal based materials are still the state-of-the-art electrocatalysts for water electrolysis and in fuel cells in terms of catalytic activity and catalyst durability. However, their scarcity and high price …
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Electrocatalysis In Li-S Batteries
… we have studied in-detail using conventional electrocatalyst i.e Pt/graphene composite, further the same extended to cost-effective electrocatalysts such as WS2 nanosheets and Metal carbides for viable practical applications. Nature of electrocatalyst, concentration of polysulfides, …
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Designing novel multinary transition metal selenides as high-efficiency oxygen evolution reaction electrocatalysts and investigating surface properties
… energy conversion devices. Exploring efficient electrocatalysts to expedite the anodic oxygen evolution reaction (OER) is a crucial task that needs to be addressed to boost the practical application of water splitting. This research focuses on the identification of OER electrocatalysts by …
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The electrochemical reduction of formic acid to methanol
… to methanol experiments, the 70:30 mol% IrO2:TaC electrocatalyst was used as the anodic electrocatalyst and polyaniline (PANI) as the cathodic electrocatalyst. In eight samples collected from five of the nine membranes which were prepared, methanol was detected by liquid injection gas …
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Electrocatalysis of oxide-based materials for the oxygen reduction and evolution reactions
… low efficiencies and associated high cost of electrocatalysts required hinder the widespread commercial success of these devices. In addition, current state - of - the - art electrocatalyst technologies suffer from severe corrosion during operation, presenting an additional barrier to …
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Effects of Magnesium Reduction on the Structure and Electrical Properties of Tantalum Oxide Aerogels
Electrocatalyst supports that have resistance to corrosion, high surface area, high porosity, and adequate electronic conductivity are needed to improve the durability of proton-exchange membrane fuel cells (PEMFC) utilized for transportation, stationary, and portable power applications. Although …
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Cyclopentadienyl ruthenium chalcogenides
… which can act as HDS catalyst as well as an electrocatalyst. The purpose of this thesis was to synthesize, characterize, and study the reactivity of ruthenium compounds containing SH, H$\sb2$S and S$\sbsp{2}{2-}$ ligands.
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Advanced Spectroscopic Methods for Photochemical and Electrochemical Systems
… energy conversion materials. Case of Electrocatalyst: Synergistic effects in cheaper Mixed-metal oxides (MMO) can overcome the traditional, expensive electrocatalysts, such as Pt/Pd/Ir. Here, we investigate a bifunctional MMO electrocatalyst composed of Cu, Co, and W for water …
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