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Electrochemical behavior and some thermodynamic properties of UCl$$_4$$ and UCl$$_3$$ dissolved in a LiCl-KCl eutectic melt

Kuznetsov, S. A.*; Hayashi, Hirokazu ; Minato, Kazuo ; Gaune-Escard, M.*

The electrochemical behavior of UCl$$_4$$ and UCl$$_3$$ dissolved in LiCl-KCl eutectic melt was studied at 723-823 K. Electroreduction of U(IV) in LiCl-KCl melt occurs via two successive steps involving transfer of one and three electrons. The diffusion coefficients of U(IV) and U(III) ions were determined by linear sweep voltammetry, chronopotentiometry, and chronoamperometry. The formal standard potential of E$$^*$$U(IV)/U(III), E$$^*$$U(IV)/U, and E$$^*$$U(III)/U were determined and some thermodynamic properties of UCl$$_4$$ and UCl$$_3$$ dissolved in LiCl-KCl eutectic melt were calculated. Influence of oxide ions on electrochemical behavior was also studied.

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Category:Electrochemistry

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