应用循环伏安法研究了在乙腈和水的混合溶液中3,4,5,6-四氯-2-三氯甲基吡啶于银电极上的电化学行为及其脱氯反应.实验表明:3,4,5,6-四氯-2-三氯甲基吡啶在银电极上的电化学还原是扩散控制的不可逆过程,并有伴随后续化学反应的特征;温度对反应有促进作用.求得3,4,5,6-四氯-2-三氯甲基吡啶在乙腈和水的混合溶液(体积比5∶1)中的扩散系数D=3.0×10-5cm2/s.

The electrochemical reductive behavior of 3,4,5,6-tetrachloro-2-trichloropyridine(heptachloropyridine) on silver electrode in the mixture of acetonitrile and water solutions containing TBAP was investigated by cyclic voltammetry.The influences of scan rate,concentration and temperature on the electrochemical behavior were discussed.It was shown that the reduction of heptachloropyridine on the silver electrode was a diffusion-controlled irreversible process.The diffusion coefficient of heptachloropyridine in the acetonitrile solution was 3.0×10-5 cm2/s.The mechanism of the dechloration of 3,4,5,6-tetrachloro-2-trichloropyridine was also discussed.