物理化学学报 >> 2007, Vol. 23 >> Issue (04): 575-580.doi: 10.3866/PKU.WHXB20070424

研究论文 上一篇    下一篇

硝基苯在离子液体BMimBF4-H2O中的电还原

马淳安; 陈松; 褚有群; 毛信表   

  1. 浙江工业大学化学工程与材料科学学院, 绿色化学合成技术国家重点实验室培育基地, 杭州 310032; 盐城工学院, 江苏 盐城 224002
  • 收稿日期:2006-09-14 修回日期:2006-11-13 发布日期:2007-04-05
  • 通讯作者: 马淳安 E-mail:science@zjut.edu.cn

Electrochemical Reduction of Nitrobenzene in Ionic Liquid BMimBF4-H2O

MA Chun-An; CHEN Song; CHU You-Qun; MAO Xin-Biao   

  1. State Key Laboratory of Green Chemistry Synthesis Technology, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, P. R. China; Yancheng Institute of Technology, Yancheng 224002, Jiangsu Province, P. R. China
  • Received:2006-09-14 Revised:2006-11-13 Published:2007-04-05
  • Contact: MA Chun-An E-mail:science@zjut.edu.cn

摘要: 采用循环伏安法和恒电位电解法研究了离子液体BMimBF4-H2O 中硝基苯在微铂电极上的电还原特性. 实验表明, 在BMimBF4中, 随着硝基苯和水的浓度变化, 循环伏安曲线的峰电位和峰电流呈现复杂的变化规律; 硝基苯在铂电极上的电还原反应为双分子8 电子3 步骤电化学过程, 第一步反应为准可逆单分子单电子转移步骤, 产生阴离子自由基, 第二步为2 电子转移步骤, 并伴有随后的双分子不可逆自由基偶合化学反应, 主要产物为氧化偶氮苯, 第三步是2 电子转移产生偶氮苯的过程.

关键词: 硝基苯, 离子液体, 水, 电还原

Abstract: Nitrobenzene was electroreduced to azobenzene in ionic liquid BMimBF4-H2O on Pt electrode at room temperature. The concentrations of nitrobenzene and water in BMimBF4 had complicated influence on the peak potential and peak current of cyclic voltammogram. The results from cyclic voltammetry and constant-potential electrolysis experiments showed that the reaction was a two-molecule and three-step electrochemical process with 8 electrons transferred. In the reaction, anion radical arose in first step, 2 electrons were transferred in second step and accompanied with coupling reaction of radicals, 2 electrons were transferred in third step, and azobenzene was produced.

Key words: Nitrobenzene, Ionic liquid, Water, Electroreduction

MSC2000: 

  • O646