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Redox Kinetics Measurements of Probucole Using Square‐Wave Voltammetry
Author(s) -
Mircčeski Valentin,
Lovrić Milivoj,
Jordanoski Blagoja
Publication year - 1999
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/(sici)1521-4109(199907)11:9<660::aid-elan660>3.0.co;2-6
Subject(s) - redox , chemistry , cyclic voltammetry , electrode , reaction rate constant , kinetics , analytical chemistry (journal) , voltammetry , square wave , electrochemistry , adsorption , electron transfer , inorganic chemistry , chromatography , physics , quantum mechanics , voltage
Probucole is both electroactive and a surface‐active compound. It undergoes fast and chemically reversible reduction at a HMD electrode in either 0.1 mol dm –3 KClO 4 or 1 mol dm –3 KNO 3 . Both probucole and its electrode reduction product are strongly adsorbed to the electrode surface and the overall electrode mechanism exhibits characteristic properties of a surface redox reaction. The kinetics of the surface redox reaction of probucole is measured by means of square‐wave voltammetry. The kinetic parameters of the redox reaction of probucole were estimated applying the methods of a split SW peak and a quasireversible maximum. In 1 mol dm –3 KNO 3 , the standard rate constant is k s =1400 ±30 s –1 and the cathodic transfer coefficient is α=0.55 ±0.02.