An Electrochemical Study of Uranium (III) and (IV) Species in Fused Alkali Chlorides

The behavior of uranium(III) and (IV) chloro-species was studied in LiCl-KCl-CsCl eutectic melt between 573 and 1073 K by potentiometry, cyclic voltammetry and chronopotentiometry. Uranium formal standard electrode potentials and U(III)/U(IV) formal red-ox potentials in the given melt were determined and thermodynamic properties of uranium chlorides calculated. Diffusion coefficients of U(III) and U(IV) ions were determined employing cyclic voltammetry and chronopotentiometry measurements.