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Showing 1 to 20 of 142 for “"Oxygen Reduction Reaction"”.
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Degradation study of substituted Iron phthalocyanine molecular electrocatalysts toward oxygen reduction reaction
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
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Using myoglobin models of oxidases for mechanistic understanding of the oxygen reduction reaction
… I have set out to understand aspects of the oxygen reduction reaction in metalloenzymes that have remained elusive. There are many pathways for the oxygen reduction reaction to take place in metalloenzymes like oxidases, but strangely, there is a high degree of variance in the active site of …
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Metal–organic framework based non-precious metal electrocatalysts for the oxygen reduction reaction
… to drive the sluggish kinetics of the cathodic oxygen reduction reaction (ORR) have rendered these devices impractical on a large scale. To address this, the development of non-platinum group metal (non-PGM) catalysts is a research area of great relevance. This thesis serves to (1) address the …
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Oxygen reduction reaction on carbon supported dispersed platinum nanoparticles and extended platinum surfaces
… preventing their broad commercialisation. The reaction of interest in this work is the oxygen reduction reaction (ORR) occurring at the cathode side of the PEFC. The ORR has been studied at great length owing to the sluggish kinetics of this reaction and thus the necessity of the higher …
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DFT insight into the oxygen reduction reaction (ORR) on the Pt₃Co(111) surface
… PEMFC is a Pt-catalyst. However, due to the slow oxygen reduction reaction (ORR) kinetics, high Pt loadings have to be used. The high Pt loadings lead to high costs of the PEMFC. Pt-Co alloys have been identified as catalysts having higher ORR activity higher than of a Pt-catalyst. Therefore, in …
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A Study Of Electrocatalysis In The Oxygen Reduction Reaction Using OpenCatalyst, a Deep-Learning Platform.
… (PEMFCs) is fundamentally influenced by the Oxygen Reduction Reaction (ORR) at the cathode. This dissertation presents a comprehensive investigation into the ORR kinetics and mechanism, with a specific focus on the electrocatalytic properties of bimetallic catalysts—particularly palladiumgold …
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Influence of particle size and morphology of Pt₃Co/C on the oxygen reduction reaction
… with no emissions. The kinetics of the cathode reaction, i.e. the oxygen reduction reaction (ORR) are sluggish necessitating high loadings of the catalyst metal, i.e. platinum. Platinum is a limited resource and expensive. Its price has been one of the major drawbacks in wide scale …
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Mechanism of oxygen reduction reaction on transition metal oxide catalysts for high temperature fuel cells
… due to the poor catalytic activity of the oxygen reducing cathode. This thesis research is focused on identifying the fundamental reaction mechanisms and pathways for oxygen reduction reaction (ORR) in transition metal oxide cathodes to enable lower operating temperature and improve device …
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Nitrogen doped carbon catalyst for the oxygen reduction reaction to be used for methane partial oxidation
… identified as promising electrocatalysts for the oxygen reduction reaction (ORR). ☐ Here, the synthesis and subsequent testing of a NDC catalyst is reported. KIT-6, a mesoporous silica was used as a hard template, with an ionic liquid being the carbon and nitrogen precursor. Powder x-ray …
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High oxygen permeation rates through poly(dimethyl siloxane) for fuel cells and oxygen reduction reaction mechanistic studies
The electrochemically catalyzed oxygen reduction reaction (ORR) is essential to operation of most fuel cells and many types of batteries; oxygen, being prevalent in air, provides a costless, ambient, high-energy (1.23 V vs. normal hydrogen electrode) hole source to complete the electrochemical …
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Design and characterization of advanced battery technologies and mechanistic studies of the oxygen reduction reaction for fuel cells
… fuel cells. The sluggish nature of the O2 reduction reaction to water, which occurs at fuel cell cathodes, is one of the main obstacles preventing the widespread commercialization of these devices. Despite many decades of research, precise mechanistic understanding of this important …
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Electrochemical analysis of active species in a low iron content oxygen reduction reaction catalyst and aluminium covetic materials
… increase fuel cell efficiency is to improve the oxygen reduction reaction (ORR) catalyst so that Pt is no longer used. Changing catalysts has proven to be difficult since it is not understood how the reaction proceeds on a non-precious metal (NPM). In the current work, a low Fe content, high …
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Ti3C2Tx as an Advanced Support Material for Polymer Electrolyte Fuel Cell Catalysts to Facilitate the Oxygen Reduction Reaction
… These fuel cells make use of hydrogen and oxygen and by means of a chemical reaction, electricity, heat and liquid water are produced. In 2015 the Department of Energy (DoE) of the United States declared a 5000-hour lifetime target for transport applicable fuel cells. With current …
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Facile Synthesis of High Surface Area Molybdenum Carbide and Nitride: An Application in Support Materials for Oxygen Reduction Reaction
… α-MoC(1-x) without the temperature programmed reduction (TPR) of MoO3 is described. This method was then used, in conjunction with a novel in situ method to obtain highly dispersed PtMoz supported on α- MoC(1-x), to explore the suitability of such materials as catalysts for oxygen reduction …
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The mobility of oxygen containing species (OCS*) over Pt-based catalyst surfaces: Impact on the oxygen reduction reaction (ORR) activity
… facing PEMFCs is the sluggish kinetics of the oxygen reduction reaction (ORR). To further enable wide-scale commercialisation of PEMFCs for automotive applications, major improvements in the ORR catalyst are therefore needed. An in depth understanding of the ORR mechanism over Pt surfaces can …
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