Electrode processes and their kinetic parameters in the reduction and oxidation of Cr(III) and Cr(II) in molten CsCl |
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Authors: | I R Elizarova |
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Institution: | 1.Tananaev Institute of Rare Element and Mineral Chemistry and Technology, Kola Research Center,Russian Academy of Sciences,Apatity, Murmansk oblast,Russia |
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Abstract: | The reduction of chromium ions in the CsCl-CrCl3 melt in wide concentration and temperature ranges is reported. It is assumed that the melt contains polynuclear chromium
complexes. The reduction of Cr(III) to Cr(II) is a reversible one-electron process. The electroreduction of divalent chromium
to chromium metal is an irreversible process involving dinuclear and mononuclear chromium complex ions. The electron transfer
rate constant has been calculated for various temperatures and chromium chloride concentrations in the salt melt. The activation
energy of electron transfer and its dependence on the CrCl3 concentration in the electrolyte have been determined for the Cr(III) ↔ Cr(II) process. |
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