Methanol oxidation on PtRu/C electrocatalysts prepared by a microemulsion method
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The Electrochemical Society
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Trabalho apresentado em evento
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Resumo
PtRu/C nanocatalysts were prepared by a microemulsion method using different values of water/surfactant molar ratio in order to get different particle sizes. Crystallite sizes and structural properties were determined by X-ray diffraction. Particle size and distribution were characterized by transmission electron microscopy and average composition was determined by energy dispersive X-ray analysis. Differential scanning calorimetry measurements indicated the presence of oxides in the as-prepared catalysts. The general electrochemical behavior was evaluated by cyclic voltammetry in 0.5 M sulfuric acid and the electrocatalytic activity towards the oxidation of methanol was studied in 0.5 M methanol acid solutions by potential sweeps and chronoamperometry. copyright The Electrochemical Society.
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(p ,p ,t) measurements , (PL) properties , Acid solutions , Average composition , Electrocatalytic activity (ECA) , Electrochemical behaviors , Electrochemical Society (ECS) , Energy dispersive X ray analysis (EDAX) , General (CO) , In order , methanol oxidation , Microemulsion methods , molar ratios , Nano-catalysts , PtRu/C electrocatalysts , Scanning calorimetry , X ray diffraction (XRD) , Bioelectric phenomena , Blood vessel prostheses , Catalysis , Chemical analysis , Chemical modification , Chemical oxygen demand , Chemistry , Chronoamperometry , Cyclic voltammetry , Differential scanning calorimetry , Electrocatalysis , Electrocatalysts , Electrochemical oxidation , Electrochemistry , Electrolysis , Electron microscopes , Electron microscopy , Electron optics , Grain size and shape , Imaging techniques , Methanol , Microemulsions , Microscopic examination , Oxidation , Particle size , Particle size analysis , Scanning , Size distribution , Steel analysis , Structural properties , Sulfuric acid , Transmission electron microscopy , Voltammetry , X ray diffraction analysis , X rays , X ray analysis
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Inglês
Citação
ECS Transactions, v. 3, n. 32, p. 11-17, 2007.
