Comprehensive analysis of electro-oxidation kinetics of alcohols such as methanol, ethanol, ethylene glycol and glycerol was performed at intermediate temperatures of around 250 oC, combining an electrochemical measurement with a reaction product analysis. Through the observations, following common features for the examined alcohols were found: (1) high oxidation current and high selectivity of CO2 were obtained; (2) hydrogen production via thermal decomposition and/or steam reforming of the alcohols (indirect path) and direct electro-oxidation of the alcohols (direct path) proceed in parallel. Based on the findings, a detailed reaction kinetic model was also discussed, considering the possible rate-determining step in direct alcohol electro-oxidation at intermediate temperatures.
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