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电化学(中英文) ›› 2005, Vol. 11 ›› Issue (3): 341-345. 

• 研究论文 • 上一篇    下一篇

硝基苯在铜电极上的电还原特性研究

樊金红,徐文英,高廷耀   

  1. 同济大学城市污染控制国家工程研究中心,同济大学城市污染控制国家工程研究中心,同济大学城市污染控制国家工程研究中心 上海200092 ,上海200092 ,上海200092
  • 收稿日期:2005-08-28 修回日期:2005-08-28 出版日期:2005-08-28 发布日期:2005-08-28

Electrochemical Reduction Characteristics of Nitrobenzene at the Copper Electrode

FAN Jin-hong~*, XU Wen-ying, GAO Ting-yao   

  1. (The National Engineering Research Center for Urban Pollution Control, Tongji Unversity, Shanghai 200092,China
  • Received:2005-08-28 Revised:2005-08-28 Published:2005-08-28 Online:2005-08-28

摘要: 应用循环伏安法和线性扫描伏安法研究水溶液中硝基苯在铜电极上的电还原特性及其电还原为苯胺的中间步骤和反应机理.结果表明:铜电极上硝基苯的还原电位在-0.58V和-1.32V左右(vs.SCE),溶液的酸性和碱性均有益于该还原反应的发生;还原过程伴有反应物吸附现象,当硝基苯浓度较大时,还原过程受传质过程控制;随着厌氧程度的提高,还原速率加快.

关键词: 硝基苯, 电还原, 电化学特性, 催化铁内电解法

Abstract: The electrochemical reduction characteristics and transition steps of nitrobenzene aqueous solution at the copper electrode, as well as its reduction mechanism were extensively investigatedby using the techniques such as cyclic voltammetry(CV) and linear scan voltammetry(LSV). The results showed that the reduction peaks of nitrobenzene at the copper electrode were located at 0.58 V and 1.32 V or so (vs. SCE), both acidity and alkalinesolutionsfavoredthe reduction of nitrobenzene. The adsorption of compounds followed by the reduction process, which is controlled by the mass transfer step at higher nitrobenzene concentration. In addition, the higher anaerobic degree led to faster reduction rate.

Key words: Nitrobenzene, Electrochemical reduction, Electrochemical characteristics, Catalyzed iron inner electrolysis

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