摘要
本文采用多种电化学研究方法探讨了酸性氯盐水溶液中Pb(Ⅱ)离子在汞电极上阴极还原的电极过程。酸性氯盐水溶液中Pb(Ⅱ)离子在汞电极上阴极还原的两电荷传递一步完成,电极过程具有扩散传质步骤控制的动力学规律。Pb(Ⅱ)离子在酸性氯盐水溶液中主要以PbCl_3^-和PbCl_4^(2-)络合离子形式存在时,其电极反应表现为PbCl_3^-和PbCl_4^(2-)络合离子直接放电还原。
The kinetics and mechanism of cathodic reduction of lead (Ⅱ) ion at the mercury electrodein aqueous chloride solution have been studied by some electrochemical methods. It is a reversible elec-trode process that lead (Ⅱ) ion is reduced into metal in aqueous chloride solution. In the electrode pro-cess the transfer of the two charges occurs in one step and the diffusion is a rate-determining step. The passible mechanism of cathodic reaction which has been shown by the study is as follows:PbCl_x^(2-x)+2e→Pb+xCl^-x is and 4.
关键词
氯盐
溶液
铅
汞电极
阴极
还原
electrolysis of chlorides
aqueous solution electrolysis
lead
electrochemical reaction
electrochemical kinetics
