LiF-NaF-KF-K_2TiF_6熔盐中Ti(IV)的电化学还原及电结晶过程(英文)

Electrochemical Reduction and Electrocrystallization Process of Ti(IV) in the LiF-NaF-KF-K_2TiF_6 Molten Salt

采用循环伏安法和计时电流法研究了700℃时LiF-NaF-KF-K2TiF6熔盐中Ti(IV)在铂电极上阴极电化学还原机理以及电结晶过程。结果表明:Ti(IV)的电化学还原机理为三步骤电荷传递反应:Ti(IV)+e→Ti(III);Ti(III)+2e→Ti(I);Ti(I)+e→Ti(0),且阴极过程可逆;电结晶过程为瞬时形核。

The mechanism of the cathode process and nucleation/growth process of Ti （Ⅳ） on the platinum electrode in the LiF-NaF-KF-K2TiF6 molten salt at 700℃ have been investigated by means of cyclic voltammetry and chronoamperometry techniques. It was found that the electrochemical reduction of Ti （Ⅳ） proceeds in three-step charge transfer： Ti （Ⅳ）＋e→Ti （Ⅲ）; Ti（Ⅲ）＋2e→Ti（Ⅰ）; Ti（Ⅰ）＋e→Ti（0）, the cathodic process is reversible and the electrocrystallization process is instantaneous.