Electrocatalytic oxidation of methanol on platinum modified polyaniline electrodes

Electrocatalytic oxidation of methanol on Pt modified polyaniline electrode s was investigated with the aim of developing highly active composite elect rodes for direct methanol fuel cells. Cyclic voltammetry and chronoamperome try were used to evaluate the catalytic activity in sulfuric acid solutions containing methanol. Pt / polyaniline modified carbon electrodes showed hi gher catalytic activity towards oxidation of methanol than Pt deposited car bon electrodes. The effect of different protonic acids used in the electroc hemical preparation of polyaniline on the oxidation current of methanol was studied. Largest oxidation current was obtained for polyanilines prepared in sulfuric acid solutions.