物理化学学报 >> 2011, Vol. 27 >> Issue (09): 2148-2152.doi: 10.3866/PKU.WHXB20110909

电化学和新能源 上一篇    下一篇

质子惰性介质中芳香族硝基化合物在铂微电极上的电化学行为

屠晓华1,2,3, 褚有群2, 马淳安2   

  1. 1. 嘉兴学院生物与化学工程学院, 浙江嘉兴 314001;
    2. 浙江工业大学应用化学系, 绿色化学合成技术国家重点实验室培育基地, 杭州 310032;
    3. 嘉兴市化工清洁工艺重点实验室, 浙江嘉兴 314001
  • 收稿日期:2011-03-22 修回日期:2011-05-27 发布日期:2011-08-26
  • 通讯作者: 马淳安 E-mail:science@zjut.edu.cn
  • 基金资助:

    国家基础研究重大项目前期研究专项(2003CCA01300)和国家自然科学基金(20376074)资助项目

Electrochemical Behavior of Nitroaromatics on Pt Microelectrode in an Aprotic Medium

TU Xiao-Hua1,2,3, CHU You-Qun2, MA Chun-An2   

  1. 1. College of Biological and Chemical Engineering, Jiaxing University, Jiaxing 314001, Zhejiang Province, P. R. China;
    2. State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Department of Applied Chemistry, Zhejiang University of Technology, Hangzhou, 310032, P. R. China;
    3. Key Laboratory of Clean Chemical Process of Jiaxing, Jiaxing 314001, Zhejiang Province, P. R. China
  • Received:2011-03-22 Revised:2011-05-27 Published:2011-08-26
  • Contact: MA Chun-An E-mail:science@zjut.edu.cn
  • Supported by:

    The project was supported by the Special Prophase Project on Basic Research of National Department of Science and Technology (2003CCA01300) and National Natural Science Foundation of China (20376074 ).

摘要: 采用循环伏安法(CV)和电化学阻抗谱(EIS)技术, 以铂微电极为工作电极, 大面积铂丝为对电极, 饱和甘汞电极为参比电极, 研究了不同芳香族硝基化合物(NA)(硝基苯、硝基萘和间二硝基苯)在含有四丁基高氯酸铵(TBAP)电解质的N,N-二甲基甲酰胺(DMF)有机溶液中的电化学行为, 并探讨了扫描速率、硝基数目和苯环数目等因素对硝基电化学还原特性的影响. 结果表明: 三种芳香族硝基化合物在铂微电极上的反应均为扩散控制的准可逆过程; 苯环上硝基数目的增加容易使硝基在较低电位下还原; 苯环数目的增加导致硝基的还原峰电流急剧减小.

关键词: 芳香族硝基化合物, 微电极, 质子惰性介质, 循环伏安, 电化学阻抗谱

Abstract: N,N-dimethylformamide (DMF) and tetrabutyl ammonium perchlorate (TBAP) were used as a solvent and a supporting electrolyte, respectively. The working electrode was a platinum microelectrode, the auxiliary electrode was a large area platinum wire and the reference electrode was a saturated calomel electrode. The electrochemical behavior of nitroaromatics (NA) was studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The effects of scan rate, numbers of benzene rings and nitro groups on the electrochemical reduction of NA were investigated systematically. The results showed that the reaction of NA on the Pt microelectrode was a quasi-reversible process controlled by the diffusion of NA. We found that NA was more electrochemically reducible when it contained more nitro groups and the reduction peak current of the nitro group decreased in the presence of more benzene rings.

Key words: Nitroaromatics, Microelectrode, Aprotic medium, Cyclic voltammetry, Electrochemical impedance spectroscopy

MSC2000: 

  • O646