Abstract

The passivating layers formed on Cd in alkaline solution in the presence of Na 2S and their electroreduction are studied through single and combined voltammetry. At low Na 2S concentrations a complex oxide—hydroxide Cd and CdS layer is produced during the anodization scan, whereas at high Na 2S concentration a CdS layer in the thickness range of a few monolayers is basically formed. Results are discussed in terms of the reaction pathways earlier reported for Cd in base solution in the absence of Na 2S.

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