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1 2002

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Adsorption Behaviour of Laprol 2402 C on Copper Electrode

Survila A., Mockus Z., Kanapeckaite S., Samulevičiene M.

Polish Journal of Chemistry

2002

Vol. 76 / nr 7

983-991

Voltammetry and EIS were applied to study the adsorption behaviour of laprol 2402 C (the copolymer of ethene and propene oxides) on a Cu electrode in strongly acidic Cu(II) sulphate solutions. Analysis of impedance data was carried out on the basis of adequate equivalent circuits, containing electric analogues of the electrochemical system. The results indicate that laprol displays a rather weak surface activity on copper in chloride-free solutions. Pronounced inhibition of Cu(II) reduction takes place, when micromolar amounts of chloride are added. A more compact surface layer involving Cl- ions is thought to be formed under these conditions.