Dynamics of anodic process of gold electrode in thiourea solution in the presence of sulfur dioxide
来源期刊：中国有色金属学报(英文版)2003年第3期
论文作者：龙怀中 舒万艮
文章页码：695 - 698
Key words：thiourea; gold; electrochemical dynamics
Abstract: The electrochemical kinetics equation of the oxidation of gold in thiourea solution in the presence of sulfur dioxide was given out. The kinetic parameters are determined as: the transmission coefficient β=0.477; when the reaction time is zero, the initial over potential of the oxidation of gold in acid thiourea solution is 0.267V. The dynamics of anodic process of gold electrode was studied by using Tafel plots. In the solution containing 5×10-6mol/L sulfur dioxide the activated energy is 46.11kJ/mol. When the electrode potential is higher than 270mV, the gold is oxidized by thiourea. The addition of H2SO3 can obviously improve the corrosion speed of gold.
基金信息：the Foundation of National Excellent Doctoral Dissertation of China
