Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (09): 1370-1374.doi: 10.3866/PKU.WHXB20070912

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Preparation and Electrocatalytic Property for Methanol Oxidation of WC/CNT Nanocomposite

LI Guo-Hua; TIAN Wei; TANG Jun-Yan; MA Chun-An   

  1. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China; School of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, P. R. China; Research Center of Nanoscience and Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
  • Received:2007-03-23 Revised:2007-05-24 Published:2007-09-06
  • Contact: LI Guo-Hua

Abstract: In order to fabricate WC/CNT nanocomposite, carbon nanotubes (CNTs) were first surface decorated by carboxy groups, and tungsten ionic groups were decorated on the surface of carbon nanotube through carboxy groups, then the tungsten ionic groups were reduced into tungsten carbide by an approach of in situ reduction and carbonization. The samples were characterized by FTIR, XRD, SEM, HRTEM, and N2 adsorption. FTIR and N2 adsorption results showed that the decorated carbon nanotube was of carboxylation, while its specific surface area increased. XRD results showed that the sample was composed of tungsten carbide (WC), carbon nanotube and non-stoichiometric tungsten oxide. SEMand HRTEMresults showed that the tungsten carbide nanoparticles with irregular granular laid on the outer surface of carbon nanotube homogenously. The electrocatalytic activity of the samples was tested by powder-microelectrode, and the results showed that the electrocatalytic activity of the sample for methanol oxidation in basic solution was higher than that of hollow microsphere tungsten carbide with mesoporosity and purified carbon nanotube.

Key words: Tungsten carbide, Carbon nanotube, Nanocomposite, Preparation, Electrocatalytic property


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