Electrochemical study of the interaction of thiourea with copper electrodes in alkaline aqueous solution

Abstract

Electrochemical data recorded for copper electrodes immersed in a solution containing thiourea indicates that thiourea is adsorbed at potentials more negative than the onset of copper oxide formation, and the passive layer is built upon a layer of adsorbed thiourea. Thus, anodization of the specimens leads to the establishment of a competition between the formation of an anodic layer containing thiourea and the oxides layer, and the electrodissolution of the metal through the anodic film.