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Electrochemical and thermodynamic properties of U4+ and U3+ on Mo electrode in LiCl-KCl eutectic

  • Ru-Shan Lin , You-Qun Wang , Zhao-Kai Meng , Hui Chen , Yan-Hong Jia , Hui He and Guo-An Ye EMAIL logo
Published/Copyright: October 13, 2018

Abstract

In this study, UCl4 was prepared by the reaction of HCl gas with UO2 in the LiCl-KCl eutectic. Then, the electrochemical behavior of U4+ and U3+ on a Mo cathode was investigated by various electrochemical techniques. The reduction process of U4+ was regarded as two steps: U4++e=U3+; U3++3e=U. Diffusion coefficients of U4+ and U3+, the apparent standard potential of U4+/U3+, U3+/U as well as U4+/U in the LiCl-KCl molten salt on the Mo electrode was determined by numerous electrochemical methods. The thermodynamic functions of formation of Gibbs free energy of UCl4 and UCl3 are calculated as well.

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Received: 2017-11-07
Accepted: 2018-08-19
Published Online: 2018-10-13
Published in Print: 2019-02-25

©2019 Walter de Gruyter GmbH, Berlin/Boston

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