质子惰性介质中硝基苯在铂微盘电极上的电化学行为

Electrochemical Behavior of Nitrobenzene on Pt Micro-disk Electrode in Aprotic Medium

采用循环伏安法,以铂微盘电极为工作电极,铂片为辅助电极,饱和甘汞电极为参比电极,研究了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,并探讨了扫描速度和底物浓度等因素对硝基苯电化学特性的影响.结果表明,该反应属扩散控制的准可逆反应.

In a three-electrode system, dimethylformamide （DMF） and tetrabutyl ammonium perchlorate （TBAP） used as solvent and supporting electrolyte, Pt micro-disk as working electrode, Pt plate as auxiliary electrode, saturated calomel electrode as reference electrode, the electrochemical behavior of nitrobenzene were studied by mean of cyclic voltammetry. The effects of scan rate and reactant concentration on electrochemical characteristics of nitrobenzene were investigated systematically. It was shown that the ArNO3/ArNO2^＊ - redox reaction of nitrobenzene on Pt micro-disk electrode was a reversible process with one transfer electron. The control step in this electrochemical process was attributed to the diffusion of nitrobenzene or its electrochemical reductive product.