Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (11): 1719-1722.doi: 10.3866/PKU.WHXB20071112

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Electroreduction Characteristics of Nitromethane in Ionic Liquid BMImBF4

MA Chun-An; WANG Xiao-Juan; LI Guo-Hua; LI Mei-Chao; CHEN Song   

  1. State Key Laboratory reeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, P. R. China
  • Received:2007-05-17 Revised:2007-08-06 Published:2007-11-01
  • Contact: MA Chun-An E-mail:science@zjut.edu.cn

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Abstract: The electrochemical reduction of nitromethane was investigated in the room temperature ionic liquid 1-butyl-3-methylimidazoliumtetrafluoroborate (BMImBF4) on a Pt disk microelectrode. The influences of temperature and scan rate on the electrochemical characteristics of nitromethane were also investigated by using cyclic voltammetry. The results showed that the electroreduction of nitromethane in BMImBF4 was an irreversible process with one electron transferred, which was controlled by diffusion. Steady-state limiting currents for the electroreduction of nitromethane in BMImBF4 at various temperatures were obtained. The diffusion coefficient was increased with temperature due to the diminution of the BMImBF4 viscosity. In terms of Arrhenius equation, the activation energy (Ea) of diffusion of nitromethane in BMImBF4 was calculated to be 39.5 kJ·mol-1.

Key words: Nitromethane, Ionic liquid, 1-butyl-3-methylimidazoliumtetrafluoroborate, Pt disk microelectrode, Diffusion coefficient