Cathodic Reduction of Zn Complex Ion in the ZnCl2-NH4Cl Electrolyte
ZnCl2–NH4Cl溶液中锌配合离子的阴极还原

The cathodic reduction process of Zn(II) ion in the ZnCl2NH4Cl electrolytic solution was investigated electrochemically. Experimental results show that the cathodic reduction of zinc ions is featured of two electrons discharging in a step. It is an irreversible electrode process in which the charge transfer is the rate-determining step In the ZnCl2NH4Cl system, the dominant form of zinc ammonium complex ion is Zn(NH3)4]2+, and the main species of the complex ion directly discharging at cathode is essentially Zn(NH3)2]2+.