LiCl-KCl-UCl3 and LiCl-KCl-UCl3-UCl4 molten salts were studied using cyclic voltammetry and chronopotentiometry techniques, respectively. It was found that the reduction of U(IV) to uranium metal involved two steps. Firstly, U(IV) was reduced to U(III). Then, the reduction of U(III) to uranium metal occurred in a step involving the exchange of three electrons. Cyclic voltammetry studies indicated that, at low sweep rates, the reduction of U(III) to uranium was reversible. Control by both diffusion and electron transfer was observed as the sweep rate increased. The diffusion coefficient of U(III) and the formal potential of U(III)/U versus Ag/AgCl reference electrode in these two salt systems were calculated (table 109).

Electrode Processes of Uranium Ions and Electrodeposition of Uranium in Molten LiCl-KCl. F.Gao, C.Wang, L.Liu, J.Guo, S.Chang, L.Chang, R.Li, Y.Ouyang: Journal of Radioanalytical and Nuclear Chemistry, 2009, 280[1], 207-18