Electrochemical studies of titanium ions (Ti4+) in equimolar KClNaCl molten salts with 1 wt% K2TiF6

The electrochemical reduction of Ti4+ ions in equimolar KClNaCl melts containing less K2TiF6 (1wt%) on a Pt electrode, was studied at 973 K by means of linear sweep voltammetry, stationary current density—potential curve and ac impedance methods. It was found that the reduction of Ti4+ ions in the molten salts proceeded in the following four consequent steps: Ti4+ + e = Ti3+; Ti3+ + e = Ti2+; Ti2+ + 2e = Ti(Pt alloy); Ti2+ + 2e = Ti(pure). And according to ac impedance measurements, the electroreduction reactions were reversible or quasireversible.