Small 2012-11-05

Template-free pseudomorphic synthesis of tungsten carbide nanorods.

Ya Yan, Lan Zhang, Xiaoying Qi, Hao Song, Jing-Yuan Wang, Hua Zhang, Xin Wang

文献索引：Small 8(21) , 3350-6, (2012)

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摘要

A unique nanorod-structured tungsten carbide material with high specific surface area of 198 m(2) g(-1) is successfully synthesized for the first time by pseudomorphic transformation of chemically synthesized WO(3) nanorods through a high-temperature method. An electrocatalyst composed of Pt nanoparticles supported on WC nanorods demonstrates higher electrocatalytic activity for methanol electro-oxidation, better tolerance to CO poisoning, and superior performance for cathodic electrocatalytic hydrogen evolution than a Pt/C catalyst. This work provides a novel method to synthesize high-surface-area nanorod-structured WC materials by preparing oxide precursors with the desired external morphology, thus offering great potential for a broad range of applications of these materials in related reaction systems.Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.