Methanol Electrooxidation on Polypyrrole Nanowire- Platinum Nanocluster in DMFCs

Abstract In This work, Pt nanoclusters were deposited in polypyrrole (ppy) nanowires by cyclic voltammetry, and formed a ppy–Pt nanocomposite on glassy carbon electrode (ppy– Pt/GCE). Metallic Pt nanoclusters were dispersed in electrically conducting ppy nanowires in order to achieve multielectron-transfer processes in a three-dimensional matrix. The electrocatalytic activities toward methanol oxidation reaction (MOR) have been investigated by CV. Larger surface area and higher electrocatalytic activity for MOR were found at ppy–Pt nanocomposite in comparison with pure Pt modified electrode, which was attributed to high dispersion of Pt nanoclusters in large surface area of ppy nanowires and synergic effect of the Pt and ppy nanowires. These Pt/WO3 microspheres appear to be a promising alternative anode material for direct methanol fuel cells.

کلیدواژه ها:

Polypyrrole Nanowire ، Pt Nanocluster ، Methanol Electrooxidation Reaction ، Direct Methanol Fuel Cell