Mesoporous Tungsten Carbide Supported Pt and Their Electro Catalytic Activity for Methanol Electro-oxidation

doi:10.3724/SP.J.1077.2013.13190

Abstract

Abstract: Mesoporous tungsten carbide supported Pt nanoparticles (Pt/m-WC) with uniform size were prepared using hard template method and H2PtCl6 as the Pt precursor. The crystal phase, structure and morphology of products were characterized with X-ray powder diffraction (XRD), transmission electronic microscope (TEM), and X-ray photoelectron spectrocope (XPS). Results show that the tungsten carbide supporter has pure tungsten carbide phase with pore size of about 10-20 nm. Pt particles (3.4 nm mean size) which are mainly in the metallic form are dispersed on the external walls and pores of m-WC. The electro-catalytic activity of the prepared Pt/m-WC towards the oxidation of methanol was investigated using cyclic voltammetry and chronoamperometry. In comparison to the common tungsten carbide supported Pt catalyst (Pt/c-WC), the Pt/m-WC catalysts exhibits high electrocatalytic activity, strong anti-poisoning ability and good stability.

Key words: direct methanol fuel cell, tungsten carbide, mesoporous materials, electro-catalysis

CLC Number:

O646

HU Xian-Chao, HU Jian-Guan, SUN Jie, LI Guo-Hua. Mesoporous Tungsten Carbide Supported Pt and Their Electro Catalytic Activity for Methanol Electro-oxidation[J]. Journal of Inorganic Materials, 2013, 28(12): 1286-1290.

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