Electrochemical kinetics of gold dissolving in alkaline thiourea solution
来源期刊：中南大学学报(英文版)2006年第5期
论文作者：王云燕 柴立元
文章页码：477 - 480
Key words：gold; alkaline thiourea; electrochemical kinetics
Abstract: Kinetic parameters of the electrode reactions were measured by investigating steady-state current-potential behaviors. The results show that the apparent transfer coefficient of anodic process is 0.058 2, diffusion coeffi-cient of thiourea gold complex is 6.04×10-6cm2/s,anodic reaction order of thiourea is 2.018 3, and anodic reactionorder of OH-is 0.016 6. The theoretical kinetics equation of gold dissolving in alkaline thiourea solution is deduced,which indicates that anodic reaction order of thiourea is 2, and anodic reaction order of OH-is 0. The theoretical values of the kinetic parameters are consistent with experimental values very well. The correctness of the mechanism is further demonstrated using apparent transfer coefficient according to the electrochemical dynamic equation of multi-electron reaction.
基金信息：the National Natural Science Foundation of China
