Note on the oxidation of methanol at Pt(1 1 1) and Pt(3 3 2) electrodes in alkaline solutions

The cyclic voltammetric behavior of different concentrations of CH3OH has been studied in alkaline solutions on Pt(1 1 1) and Pt(3 3 2). The oxidation of CH3OH gives well-defined current density–potential curves at around the potential where the adsorption of OH occurs on Pt. rrent–potential behavior of the hydrogen adsorption–desorption shows that CH3OH or related species adsorbs on the step sites of (3 3 2) surface, but less on the (1 1 1) surface. alysis of the voltammograms with less concentrated methanol solutions is suggested in order to understand the mechanism of CH3OH oxidation reaction in alkaline media.