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Split square‐wave voltammograms of surface redox reactions
Author(s) -
Mirčeski Valentin,
Lovrić Milivoj
Publication year - 1997
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140091613
Subject(s) - redox , square wave , kinetic energy , chemistry , reaction rate constant , analytical chemistry (journal) , electrochemistry , adsorption , mercury (programming language) , voltammetry , inorganic chemistry , electrode , kinetics , chromatography , physics , quantum mechanics , voltage , computer science , programming language
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).