Premium
Theory of Square‐Wave Voltammetry of a Reversible Redox Reaction Complicated by the Reactant Adsorption
Author(s) -
Lovrić Milivoj
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200203)14:6<405::aid-elan405>3.0.co;2-c
Subject(s) - adsorption , redox , monolayer , voltammetry , square wave , chemistry , ion , cyclic voltammetry , metal , analytical chemistry (journal) , metal ions in aqueous solution , electrode , electrochemistry , inorganic chemistry , chromatography , organic chemistry , physics , quantum mechanics , voltage , biochemistry
A theoretical model of square‐wave voltammetry combined with the adsorptive accumulation of the reactant is developed. On a stationary spherical electrode the square‐wave voltammograms of a reversible redox reaction complicated by the reactant adsorption depend on lateral interactions in the monolayer. Attraction forces increase the difference between the potentials of the maxima of the post‐peak and the main peak, and they may cause the splitting of the post‐peak, while repulsion prevents the separation of these two peaks. The manifestation of anion‐induced adsorption of metal ions is the increasing and decreasing of the maximum response as the function of ligand concentration. The application of this phenomenon for the qualitative metal speciation at interfaces is discussed. It is shown that the response is not distorted by the adsorption induced capacitive current.