Collect. Czech. Chem. Commun. 1979, 44, 1869-1876

Galvanostatic electrolysis with current reversal. Case of follow-up chemical reaction leading to electroactive substance after current reversal

Oldřich Dračka and Oldřich Fischer

Department of Theoretical and Physical Chemistry, Purkyně University, 611 37 Brno


For the galvanostatic method with current reversal, two cases are solved, in which an electroinactive substance M is formed by an irreversible electrode reaction and from this a substance P is formed by a chemical reaction. After a current reversal, P is consumed at the electrode. In one case, the substance P is moreover irreversibly converted to an electroinactive product Z. The corresponding schemes are M → P → Z and M ##e P. The solution is derived both for homogeneous chemical reactions and for reactions of substances accumulated on the electrode. The possibilities of distinguishing these cases from others and determination of the kinetic parameters are discussed.