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Anodic Oxidation of Methanol on Platinum

1962; Institute of Physics; Volume: 109; Issue: 11 Linguagem: Inglês

10.1149/1.2425246

1945-7111

S. Gilman, M.W. Bréiter,

Molecular Junctions and Nanostructures

The shape of periodic potentiostatic current‐potential curves at low sweep rate in at different methanol concentrations is discussed on the basis of the methanol and oxygen coverage of the surface. At the foot of the first oxidation wave the current is due solely to the oxidation of adsorbed methanol molecules for . Adsorption and the subsequent discharge step are rate‐determining. For methanol oxidation occurs at a larger rate. Two possible interpretations are suggested. The decrease of the current after the first peak is attributed to the blocking action of adsorbed oxygen atoms. The shape of anodic current‐potential curves which were taken with single sweeps of different sweep rate in is interpreted on the basis of a concept of two partial currents of methanol oxidation.