Journal
SMALL
Volume 8, Issue 21, Pages 3350-3356Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201200877
Keywords
tungsten carbide; pseudomorphic transformation; nanorod-structure; electrocatalysis
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Funding
- academic research fund AcRF tier 2 [MOE2009-T2-2-024]
- Ministry of Education, Singapore
- National Research Foundation, Singapore [2009 NRF-CRP 001-032]
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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 WO3 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.
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