Abstract
The electrocatalytic oxidation of methanol at a (Pb) lead electrode modified by Pt, Pt–Ru and Pt–Sn microparticles dispersed into poly( o-phenylenediamine) (P oPD) film has been investigated using cyclic voltammetry as analytical technique and 0.5 M sulfuric acid as supporting electrolyte. It has been shown that the presence of P oPD film increases considerably the efficiency of deposited Pt and Pt alloys microparticles toward the electrocatalytic oxidation of methanol. The catalytic activity of Pt particles is further enhanced when Ru and especially Sn, is co-deposited in the polymer film. The effects of various parameters such as concentration of methanol, medium temperature as well as the long term stability of modified electrodes have also been investigated.
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