功率超声对电化学反应和电极表面的影响研究

The Effect of Ultrasound on Voltammetric Behavior and Surface of Electrode in Different Electrochemical System

对在超声条件下K3[Fe(CN) 6 ]在Pt电极上的还原反应和丙烯腈在镉电极上的电化学氢化二聚反应的循环伏安行为进行比较 ,通过调整功率超声的强度和声幅射头与电极间的距离 ,研究了不同超声条件下功率超声对这两种体系的影响程度。比较超声作用前后电极表面状态变化的结果表明 ,超声不仅能够强化电极反应的传质过程 ,同时对电极表面也有不同程度的粗化作用 。

Voltammetric behavior on electrohydrodimerization of acrylonitrile at Cd electrode was compared with the reduction of K3[Fe(CN)6] at Pt electrode in the presence of power ultrasound. The results showed that the limiting current response of cyclic voltammetry is increased under the lower ultrasonic intense condition for two reactions, but the limiting current response of the first reaction markedly decreased under higher ultrasound intense condition caused by bleeding of H2. The surface of Cd electrode was seriously destroyed by increasing ultrasound intense.