对硝基苯甲醚在Cu电极上的电化学还原行为研究

Electrochemical Reduction Behavior of p-Nitroanisole on Copper Electrode

以Cu盘做工作电极,Pt丝做辅助电极,饱和甘汞电极做参比电极,采用循环伏安法和计时电量法等测试手段研究了对硝基苯甲醚在含0．5 mol/L硫酸的甲醇水(体积比3：2)溶液中的电化学行为,讨论了扫描速度、底物浓度以及温度对对硝基苯甲醚电化学行为的影响．研究证明：对硝基苯甲醚在Cu电极上的电化学还原是受扩散控制的不可逆过程,根据不同扫描速度下循环伏安曲线的峰电流值求得其传递系数α为0．26,计时电量法求得其扩散系数为1．03×10^(-5)cm^2/s．

The electrochemical behavior of p-Nitroanisole on copper electrode in methanol-H2O solution was investigated by cyclic voltammetry and chronocoulometry. The influences of scan rate, concentration and temperature on the electrochemical behavior were discussed. It was showed that the reduction of p-nitroanisole on copper electrode was a diffusion-controlled irreversible process. The diffusion coefficient D of p-Nitroanisole in methanol-H2O solution was 1. 03 ×10^-5cm^2/s, while the transfer coefficient was 0. 26.