Quantitative Analysis of Electrooxidation Products on Platinum for Direct Ethanol Fuel Cell

抄録

In order to develop a principle of the materials design for the high CO₂ generation efficiency during the C₂H₅OH electrooxidation, the reaction pathways during the electrooxidation of C₂H₅OH and CH₃CHO which is a by-product during the electrooxidation of C₂H₅OH have been quantitatively analyzed. As a result, a direct pathway from C₂H₅OH to CO₂ and a pathway via CH₃CHO toward CO₂ coexisted at 0.4 V, 70°C. At 0.6 V, 70°C, the both pathways from C₂H₅OH to directly CO₂ and from C₂H₅OH via CH₃COOH to CO₂ existed. Especially in the latter pathway, the activity of Pt was found to be deteriorated by the adsorbed species which would be formed as an intermediate of CH₃COOH formation.