JOURNAL of the Tunisian Chemical Society

serving the Research, the Education and the Industry

Electrochemical behavior of uranium in sodium fluoride/sodium fluoroborate eutectic melt at 420°C

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The current-voltage curves were obtained at different electrodes in the eutectic NaF-NaBF4 melt. Various compounds of uranium were dissolved in the molten salt and then studied electrochemically. The oxidized form U(VI) and the reduced form U(IV) can be simultaneously stable and make up the forms of an electrochemical system. Oxidization of U(IV) occurs according to the following scheme :
UF62- → [UFn]6-n + 2é + (6-n) F-
[UFn]6-n + 2O2- → UO2F42- + (n-4)F-

A. Gadri, M. Brigaudeau

Pages 21-27

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