Split square‐wave voltammograms of surface redox reactions

Abstract

Abstract 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 = k s /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 k s = 60 ± 10s −1 , α = 0.45 ± 0.03 and E ° = −0.810 ± 0.005V (vs. Ag/AgCl‐KCl).