Electrochemical properties of niobium in carbamide-halide melts

摘要

The mechanism of niobium electrochemical dissolution was investigated by cyclic voltammetric method and by spectral methods in melts carbamide-NH_4Hal, where Hal -Cl, Br I, F, and carbamide-MeCl, where Me -Na, K, Cs. It was defined, that after electrochemical Dissolution the metal passes over to ions Nb (V) and forms the complexes [NbHal_6]~-. The formation Low valency forms of niobium was observed under oxidation the metal only in F~--containing melts And under reduction of Nb (V) in carbamide-chloride and carbamide-bromide melts.