engleski

Redox kinetics in cathodic stripping square-wave voltammetry

Several redox systems with reactants which are immobilized at the electrode surface (EuSal complex, SeIV and SeIV in the presence of CuII, cysteine and p-nitrophenol) were studied by square-wave voltammetry to examine whether their redox kinetics can be measured by using the phenomenon of the ‘quasireversible maximum’. This is explained in detail. The following standard rate constants are obtained: EuSal complex ks = 720 ± 31 s−1, SeIV/CuII, log [ks/(cms−1)] = 0.94 ± 0.9, cysteine, log [ks/(cms−1)] = 0.6 ± 0.9 and p-nitrophenol, ks > 1200 ± 50 s−1.

reox kinetics ; square-wave voltammetry

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