Electrochemical behavior of uranium(III) in NaCl-KCl molten salt

摘要

The electro-redox behavior of uranium(III) on Mo electrode in NaCl-KCl molten salt in the temperature range 973-1073 K has been investigated using cyclic voltammetry electrochemical method and so on, such research will help to understand uranium behavior in pyro-reprocessing. The results showed that UCl3 could be reduced into uranium metal in a quasi-reversible one-step process exchanging three electrons. The diffusion coefficients of U(III) ions were determined and the activation energy for diffusion was found to be 55.794 kJ mol(-1). The apparent standard potentials of U(III)/U(0) at several temperatures were calculated. The thermodynamic properties of UCl3 have also been investigated.