Investigation of methanol electrooxidation on Pt and Pt-Ru in H3PO4 using MEA with PBI-H3PO4 membrane

► CH3OH electrooxidation on Pt, Pt-Ru was studied in presence of H2O and CO in gas phase at 130-190°C. ► CH3OH oxidation orders in respect to H2O and CH3OH partial pressures were determined. ► On Pt-Ru oxidation proceeds primarily by indirect route via formation of intermediate COads. ► On Pt oxidation proceeds by direct route via formation of weakly adsorbed intermediates.