ELECTROREDUCTION　OF　Zn^2＋　AND　Ni^2＋　AND　Cu^2＋　IN　UREA－CHLORIDES　MELT

ELECTROREDUCTION OF Zn￣(2 +) AND Ni￣(2 +) AND Cu￣(2 +) IN UREA-CHLORIDES MELT

ＥＬＥＣＴＲＯＲＥＤＵＣＴＩＯＮＯＦＺｎ２＋ＡＮＤＮｉ２＋ＡＮＤＣｕ２＋ＩＮＵＲＥＡ－ＣＨＬＯＲＩＤＥＳＭＥＬＴＬｉｕＰｅｎｇ；ＹａｎｇＱｉｑｉｎ；ＬｉｕＧｕａｎｋｕｎ(ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＺｈｏｎｇｓｈａｎＵ?..

The cyclic voltammetry, current-time curve at potential step were used to investigate the electroreduction of Zn2+, Ni2+ and Cu2+ in the urea-chlorides melt. Experimental results indicate that the electoreduction of Zn2+ to zinc is reversible in one step, the electoreduction of Ni2+ to nickel is irreversible in one step and the electroreduction of Cu2 + to copper is reversible with two steps. The diffusion coefficients of Zn2+ , Ni2+ and Cu2 + in urea-chlorides melt and the transfer coefficient of Ni2 + + 2e→Ni were deterrnined.