Electrochemical Study of Stabilization Higher Oxidation States of d- and f-Metals in Molten Salts

摘要

Conditions of stabilization higher oxidation states of d- and f-metals in molten salts of various anionicand cationic compositions, which determine, respectively, the composition of the first and secondcoordination spheres of the complexes, have been studied by voltammetry. The stabilization of higheroxidation states is observed when passing from pure chloride to oxochloride melts and from chloride- fluoride to oxofluoride melts. The possibility of stabilization higher oxidation states of chromium inthe melts due to the formation of heteronuclear complexes has been demonstrated. It was shown thatstabilization of higher oxidation states is accompanied by reaction of disproportionation withformation of fine metal powder in the bulk of the melt and surface coating.