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Showing 1 to 18 of 18 for “"Ethanol Oxidation"”.
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In situ laser Raman studies of the mechanism of ethanol oxidation over supported molybdenum oxide
"Ethanol oxidation over supported molybdenum oxide was studied by in situ laser Raman spectroscopy, deuterium isotopic substitution, together with steady-state and transient reactivity and kinetic measurements. The combination of techniques allows a complete description of the mechanism of ethanol …
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Aerosol Synthesis and Electrochemical Analysis of Niobium Mixed-Metal Oxides for the Ethanol Oxidation Reaction in Acid and Alkaline Electrolyte
Direct ethanol fuel cells are especially important among emerging electrochemical power systems with the potential to offset a great deal of the energy demand currently met through the use of fossil fuels. Ethanol can be refined from petroleum sources or attained from renewable biomass, and is more …
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Gold based electro catalysts
… size are explored for the oxygen reduction, ethanol oxidation and carbon monoxide oxidation reactions (Chapter four). The results show the oxygen reduction and ethanol oxidation reactions were favoured using larger particles, 6 nm in diameter, whilst the CO oxidation reaction was more facile …
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In-situ spectroelectrochemical surface studies of fundamental fuel cell catalysis
… of fuel cell relevant systems. Primarily, ethanol oxidation was studied due to the potential of ethanol as an easily-transported and manufactured fuel with a higher molecular energy density of 12 electrons per molecule. Additionally, the reaction intermediate carbon monoxide was studied …
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Partial oxidation of ethanol over vanadium iron antimonate catalysts
VSbO₄ and FeSbO₄ are proven catalysts for the amm(oxidation) of propane/propylene. These catalysts systems have been shown to possess over-oxidation limiting characteristics. Ethanol oxidation is carried out in two-staged processes industrially, mainly because of the challenges presented by …
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Development and Application of in Situ/Operando Spectroscopic Techniques for Understanding Active Sites and Surface Intermediate Species in Heterogeneous Catalysis
… catalytic systems for propylene metathesis and ethanol oxidation reactions. For propylene metathesis, tungsten-based catalysts supported on silica (zWOX/SiO2) and titania-promoted silica (zWOX/yTiOX/SiO2) were explored. Catalyst preparation via incipient wetness impregnation revealed that …
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Anodic alcohol fuel cell reactions at platinum active sites on doped metal oxide supports
… faster kinetics and less poisoning during the methanol and ethanol oxidation reactions compared to the commercial Pt/C. When compared in an acidic ethanol and methanol oxidation, Pt/TOS and Pt/NbOS exhibit smaller activation energies than Pt/C, however, only Pt/NbOS produces smaller charge …
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Evaluation of TiO2 as a Pt-Catalyst Support in a Direct Ethanol Fuel Cell
Direct ethanol fuel cells are of interest due to the high energy density, ease of distribution and handling, and low toxicity of ethanol. Difficulties lie in finding a catalyst that can completely oxidize ethanol and resist poisoning by intermediate reaction species. Degradation of the catalyst …
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Synthesis of Platinum and Platinum-Copper Branched Nanoparticles for Electrooxidation of Methanol
… CO-poisoning and improved efficiency of</p> <p>ethanol oxidation.</p>
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A Specialized Citric Acid Cycle Requiring Succinyl-Coenzyme A (CoA):Acetate CoA-Transferase (AarC) Confers Acetic Acid Resistance on the Acidophile Acetobacter aceti
… of acetic acid bacteria to aerobically oxidize ethanol to acetic acid has been harnessed for millennia to produce vinegar. Acetic acid permeates cell membranes at low pH and generally inhibits bacterial growth at low millimolar concentrations. The strains used for vinegar production, however, …
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Kinetics and Mechanism of Ozone Decomposition and Oxidation of Ethanol on Manganese Oxide Catalysts
… because it is a well-known catalyst for complete oxidation reactions. The first case studied was that of the ozone decomposition reaction on a supported manganese oxide catalyst. An adsorbed species with a Raman signal at 884 cm-1 was observed and assigned to a peroxide species based on results of …
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Synthesis, characterization and catalytic testing of metal tungstates as catalysts for activation of lower alkanes
… surface of these catalysts for selective alkane oxidation. This concept is not restricted to vanadium oxide. The deliberate use of hydrothermal techniques can turn the typical combustion catalyst manganese oxide into a selective catalyst for oxidative dehydrogenation of propane (ODP). …
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Structural characterization of multimetallic nanoparticles
… are found to be more efficient as catalysts in ethanol oxidation reaction (EOR) than monometallic Pd catalysts. The combination of metal support interaction and reactive/non-reactive environment was found to determine the thermal evolution and ultimate structure of this binary system. The …
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Mechanistic characterization of acetic acid resistance enzymes of Acetobacer aceti
… the industrial production of acetic acid from ethanol. Oxidation of ethanol by membrane-bound oxidoreductases provides energy for A. aceti and the production of high concentrations of acetic acid is an effective defense mechanism. Acetic acid diffuses through cell membranes at low pH and …
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Electrochemical and spectroscopic interfacial investigations of small organic molecule electrooxidation on platinum electrodes
… for fuel cells, the intermediates of the oxidation of formic acid and ethanol to CO2 on platinum electrodes have been examined. The adsorbed carbon monoxide intermediate continues to be the cause for a decrease in efficiency and activity for platinum electrodes and is the leading surface …
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Alloy catalysts for fuel cell-based alcohol sensors
Direct ethanol fuel cells (DEFCs) are attractive from both economic and environmental standpoints for generating renewable energy and powering vehicles and portable electronic devices. The cost and performance of the DEFCs are mainly controlled by the Pt-base catalysts used at each electrode. In …
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Design and synthesis of novel nanometallic catalysts and electrode materials for green fuel cells
… of attention recently. In particular, the direct ethanol fuel cells (DEFCs) and microbial fuel cells (MFCs) are significant due to their green fuel, less waste generated and environmental friendliness. Hence the overall goal of this work is to develop novel catalysts and electrodes for improving …
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Multifunctional oxidation electrocatalysts for direct alkaline fuel cells
… been reported in alkaline environments for both oxidation and reduction processes occurring at each of the electrodes. The discussion related to the first part of this dissertation focuses on the development of novel electrocatalysts for the oxidation of hydrazine for application in direct …