Acta Phys. -Chim. Sin. ›› 2005, Vol. 21 ›› Issue (07): 721-724.doi: 10.3866/PKU.WHXB20050705

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The Catalytic Behavior of Tungsten Carbide for the Electroreduction of p-nitrophenol

MA Chun-an; HUANG Ye; TONG Shao-ping; ZHANG Wei-min   

  1. Department of Applied Chemistry, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Research Center of Nano Science & Technology, Zhejiang University of Technology, Hangzhou 310032
  • Received:2004-11-23 Revised:2005-01-04 Published:2005-07-15
  • Contact: MA Chun-an

Abstract: Tungsten carbide powder microelectrode (WC-PME) was prepared from tungsten carbide (WC) powders to be used as an electrocatalyst. Electrochemical reduction behaviour of p-nitrophenol (PNP) on the WC-PME was investigated using cyclic voltammetry (CV) and linear sweep voltammetry. It was found that reduction potential of PNP on the WC-PME was more positive than that on the Cu-Hg microelectrode and that WC had higher catalytic activity in the electroredution of PNP than Cu-Hg. Although the reduction potentials of PNP on the WC-PME and the Pt microelectrode were close to each other, the reduction current of PNP on the WC-PME was about 5 times as large as that on the Pt microelectrode. This result was mainly attributed to the surface morphological structure of WC.

Key words: Tungsten carbide, Powder microelectrode, p-nitrophenol, Electroreduction, Electrocatalyst