Abstract
Abstract The rates of the methanol oxidation and the COad formation at Pt electrodes in solutions of CH3OH+0.5 mol dm−3 H2SO4 were investigated under the conditions minimizing the harmful effect of impurities. Under the particular conditions, the both rates decreased remarkably towards zero at a limiting coverage of about 0.8. Namely, the COad hindered both the formation of the COad itself and the oxidation of methanol via some unidentified intermediate other than COad. This fact was explained by assuming an aggregate with two vacant sites indispensable for the COad formation and the methanol oxidation to CO2.
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