engleski

Split square-wave voltammograms of surface redox reactions

A fast and simple method for the estimation of kinetic parameters of surface redox reactions, based on the splitting of their square-wave voltammograms, is proposed. A mathematical procedure for simulation of these processes is developed. The method can be applied for the fast and chemically reversible redox reactions which are characterized by the kinetic parameter K 0.8 (K = ks/f). The standard rate constant, transfer coefficient and standard redox potential of the redox reaction of alizarine-red S adsorbed on the mercury electrode in pH 9 medium are ks = 60/s and alfa = 0.45 and E0 = -0.810 V (vs Ag/AgCl-KCl).

surface reaction; square-wave voltammetry; alizarin red S; adsorption

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