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| - Methanol Electrochemical Oxidation on Au/Pt Electrode Enhanced by Phosphomolybdic Acid
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| Abstract
| - Methanol electro-oxidation was investigated on a Au-modified Pt (Au/Pt) electrode together with phosphomolybdic acid (H3PMo12O40, PMo12). Au/Pt electrode was prepared by chemically replacing underpotentially deposited Cu on Pt surface in HAuCl4 solution. The morphology of a Au/Pt electrode was characterized by field emission scanning electron microscope. The results showed that Au particles with a mean size of 10 nm were uniformly dispersed on the Pt surface. The methanol electro-oxidation on the Pt electrode was markedly enhanced not only by the phosphomolybdic acid solution but also by adatom Au. The onset potential of methanol oxidation shifts 400 mV toward the negative direction on the Au/Pt electrode with phosphomolybdic acid in comparison with a Pt electrode with phosphomolybdic acid. It is supposed that adsorbed hydrogen and intermediate CO from the methanol dehydrogenation and oxidation were electrocatalytically oxidized by the oxidant state of phosphomolybdic acid with the aid of Au catalysis.
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| - Electrochemical Oxidation on Au/Pt Electrode
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