本文采用多种电化学力法探讨了酸性氯化物水溶液中Cu(Ⅱ)离子在钛电极上阴极还原的电极过程动力学规律与反应机理。在酸性氯化物水溶液中,Cu(Ⅱ)离子主要以CuCl_4~(2-)络离子形式存在。CuCl_4~(2-)络离子经历离解一个配位氯离子的前置转化反应后在钛电极上分步还原,电极过程为第一个电荷传递电化学反应所控制。由于岐化反应作用,电极过程在钛电极上析出金属铜以后转变为扩散传质步骤所控制。 In this paper, a variety of electrochemical methods were used to investigate the electrode kinetics and reaction mechanism of Cu (Ⅱ) ion cathodic reduction on a Ti electrode in acidic chloride aqueous solution. In acidic chloride aqueous solution, Cu (Ⅱ) ions mainly exist as CuCl 4 2- ions. CuCl_4 ~ (2-) complex ion undergoes a pre-conversion reaction of dissociating a coordinated chloride ion and then is reduced in a stepwise manner on the titanium electrode. The electrode process is controlled by the first charge-transfer electrochemical reaction. Due to the disproportionation reaction, the electrode process is controlled by the step of diffusion mass transfer after the metal copper is precipitated on the titanium electrode.