Abstract
The electrosorption and electro-oxidation of methanol on Pt(100) single-crystal surfaces have been studied using programmed potential voltammetry (PPV). Deconvolution of the main oxidation peak of methanol adsorption residues leads to three secondary peaks at short adsorption times ( t ads < 1 s) and two secondary peaks at medium and long adsorption times. The correlation of the quantities of electricity of the secondary peaks with the decrease in the quantity of electricity related to hydrogen desorption was obtained by means of an approximation method. Thus the number N eps of electrons per site was calculated for each peak. The N eps values for the three peaks resulting from the deconvolution leads to the conclusion that at short t ads multibonded or bridged CO species coexist with linearly bonded CO and formyl species, while at medium and long t ads only linear CO and formyl species exist.
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