Abstract

Current density-potential curves have been obtained for the electrolysis of uranium oxide in a molten fluoride mixture, i.e. BaF 2CaF 2LiFUF 4, at 1200 and 1250 °C. Three kinds of reduction were found to occur at the cathode: (1) U 4+ + e − → U 3+; (2) U 3+ + 3e − → U; (3) U 4+ + 4e − → U. The reduction of U 3+ to U was found to be relatively fast from analysis of the current density-potential curves and from X-ray photospectroscopic analysis of uranium species present in solidified salts.

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