Theoretical model of ion transfer-electron transfer coupled reactions at the thick-film modified electrodes

FRANCO MARTIN ZANOTTO, RICARDO ARIEL FERNÁNDEZ, SERGIO ALBERTO DASSIE

JOURNAL OF ELECTROANALYTICAL CHEMISTRY - (Print)

ELSEVIER SCIENCE SA

Lugar: Amsterdam; Año: 2017 vol. 784C p. 25 - 25

1572-6657

he theory of cyclic voltammetry of ion transfer-electron transfer coupled reactions in a thick organic film modified electrodeis developed. The model system consists of a planar electrode completely covered by an organic phase, which inturn is in contact with an aqueous phase, each containing a supporting electrolyte. It is shown that the coupling betweenthe ion transfer-electron transfer processes at both, solid∣liquid and liquid∣liquid interfaces, has a marked effect on theshape of the voltammogram. The model allows the analysis of the system in different experimental conditions. In particular,the results for different concentration ratios of the redox probe and supporting electrolytes are presented. Thevariation of the potential of the solid∣liquid and the liquid∣liquid interfaces reflects changes in concentration of the speciesinvolved. This variation is presented as a descriptor of the shape of the voltammograms. The theoretical results are contrastedwith