Facilitated proton transfer via water autoprotolysis-electron transfer coupled reactions at thick-film modified electrodes

ZANOTTO, F.M.; FERNÁNDEZ, R.A.; DASSIE, S.A.

ELECTROCHIMICA ACTA

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2020 vol. 349 p. 136316 - 136316

0013-4686

e present the derivation of a general mathematical model for facilitated proton transfer (FPT) reactionsacross a liquid|liquid (L|L) interface assisted by a protonatable neutral weak base at a thick organic filmmodified electrode setup. The effect of the explicit consideration of water autoprotolysis is analysed. Themodel reported in this paper allows us to simulate the system under different experimental conditions,such as initial pH, organic phase to aqueous phase volume ratio and concentration of redox probe andtransferring protonated species. This model for the FPT reactions via water autoprotolysis in a systemwith two polarized interfaces is compared to our previous results calculated for a single polarizableinterface [J. Electroanal. Chem. 578 (2005) 159e170]. We simulate a system with a single redox probewith two reversible non-simultaneous reduction processes with the goal of obtaining detailed mechanisticinformation of the facilitated proton transfer via water aut