Kinetics and mechanism of the electroreduction of anodic layers produced on cadmium in alkaline solution containing sodium sulphide

Abstract

The kinetics of the potentiostatic electroreduction of different anodic layers produced on cadmium in Na₂S containing alkaline solutions has been studied at 25°C. Two types of anodic layer were used: (i) layers produced in the potential range of CdS and Cd(OH)₂ stability, and (ii) layers predominantly composed of CdS. The electroreduction kinetics for both layers can be explained reasonably well throughout the nucleation and growth processes under diffusion control.