ELECTROLYSIS OF CARBAMIDE-CHLORIDE MELTS AT INERT ELECTRODES

Electrode reactions in carbamide and carbamide-chloride melts have been studied by cyclic voltammetry in combination with chromatography and IR spectroscopy of melts and gases for determining the electrolysis products. The interest in this process is accounted for by application of these melts as supporting electrolytes for electrochemical investigations. The peculiarities of carbamide-NH

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Cl melt electrochemical behavior have been established. A new compound is formed during electrolyses at the potential of 1V, which is present in melt and in anodic gases (IR Spectroscopy). The investigation of electrochemical properties of this compound showed that it is electrochemically active (cyclic voltammetry) and is adsorbed (C-E method) on inert electrodes (Pt, glassy carbon). The formation of this compound, characterized by N-Cl bond, explains the depassivation effect of refractory metals under anodic dissolution if polarizable electrode reaches the transpassive region.