Electrochimica Acta ( IF 6.6 ) Pub Date : 2020-01-14 , DOI: 10.1016/j.electacta.2020.135705 Vladimir M. Volgin , Tatyana B. Kabanova , Alexey D. Davydov
The mass transfer during the electrochemical dissolution of metals with the participation of electrolyte anions and the formation of stable anionic complex are analyzed by the example of tungsten anodic dissolution in the alkaline solutions. The distributions of ionic concentrations, partial current densities of ions and potential over the solution layer near the anode are determined as a result of numerical solution of the problem. The results of numerical solution are compared to the results of analytical solution and experimental data available from the literature. It is shown that the numerical solution of the problem with regard for migration, convection and concentration dependences of transport properties of solution agrees well with the experimental data. A complex role of ion migration in this process is revealed.
中文翻译:
钨圆盘电极在碱性溶液中阳极溶解过程中传质的理论分析
以钨在阳极溶液中的阳极溶解为例,分析了在金属的电化学溶解过程中,电解质阴离子的参与下的传质以及稳定的阴离子络合物的形成。作为问题的数值解的结果,确定了在阳极附近的溶液层上的离子浓度,离子的部分电流密度和电势的分布。将数值解的结果与解析解的结果和可从文献中获得的实验数据进行比较。结果表明,关于迁移性质,对流和输运性质的浓度依赖性问题的数值解与实验数据吻合良好。揭示了离子迁移在此过程中的复杂作用。