Compared Study of Catalytic Activity for Methanol Oxidation on Different Pt-WO3/C Electrodes

doi:10.3724/SP.J.1095.2011.00697

Chinese Journal of Applied Chemistry ›› 2011, Vol. 28 ›› Issue (12): 1415-1420.DOI: 10.3724/SP.J.1095.2011.00697

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Compared Study of Catalytic Activity for Methanol Oxidation on Different Pt-WO3/C Electrodes

YAN Peng^1,2, XU Yingming¹, ZHAO Hui^1*, HUO Lihua¹, GAO Shan¹

(1.Laboratory of Functional Materials,School of Chemistry and Materials Science,Heilongjiang University,Harbin 150080;
2.Department of Materials Science and Chemistry,Heilongjiang Institute of Technology,Harbin)

Received:2010-11-24 Revised:2011-05-18 Published:2011-12-10 Online:2011-12-10

Abstract

Abstract:

Tungsten oxide-based nano-materials with two different crystal structures were prepared by hydrothermal method and characterized by X-ray diffraction(XRD) and electron probe micro analyzer(EPMA), respectively. The electrocatalytic activity for methanol oxidation on Pt-WO3/C electrode was studied by cyclic voltammetry. The results indicate that the electrocatalytic activity of Pt-WO3/C is much higher than that of Pt/C catalyst. For various amount of WO3, the catalyst with 20% mass fraction of WO3 has the best electrocatalytic activity. The electrocatalytic activity of the pyrochlore type tungsten oxide doped Pt/C electrode is higher than that of the tungsten bronze doped electrode, which is likely due to the strong attractions of OHads on the surface of pyrochlore type tungsten oxide. The current density of the pyrochlore type tungsten oxide doped Pt/C electrode for electro-oxidation of methanol is 87.2×10-3 A/cm2 in 0.5 mol/L CH3OH+1 mol/L H2SO4 solution.

Key words: methanol, fuel cell, Pt- tungsten oxide/C catalyst

CLC Number:

O614
O612

YAN Peng1,2, XU Yingming1, ZHAO Hui1*, HUO Lihua1, GAO Shan1. Compared Study of Catalytic Activity for Methanol Oxidation on Different Pt-WO3/C Electrodes[J]. Chinese Journal of Applied Chemistry, 2011, 28(12): 1415-1420.

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Compared Study of Catalytic Activity for Methanol Oxidation on Different Pt-WO3/C Electrodes

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