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Electrochemical studies of copper in N-N, dimethylformamide in the presence of water, ethanol and acetic acid as additives

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Author(s): Gonçalves Reinaldo S. | Lucho Alzira M. S.

Journal: Journal of the Brazilian Chemical Society
ISSN 0103-5053

Volume: 11;
Issue: 5;
Start page: 486;
Date: 2000;
Original page

Keywords: copper electrode | electrooxidation

ABSTRACT
The electrochemical behaviour of copper has been investigated in N-N, dimethylformamide in the presence of water, ethanol and/or acetic acid as contaminants, by a potentiodynamic method. The electrooxidation of the electrode started at around -0.20V(SCE). Two oxidation peaks were observed and attributed to Cu -> Cu(I) and Cu -> Cu(II) processes. The reduction of the oxide was observed during the cathodic potential sweep. The presence of water and ethanol increased the anodic current while in the presence of acetic acid this process was inhibited. The incidence of polychromatic light on the electrode surface decreased the anodic current. It was suggested that the light affects the interaction between the adsorbed water and the surface of the metal.

Tango Jona
Tangokurs Rapperswil-Jona

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