Electrochemical-Catalytic EEC’ Mechanism Can Reveal Two-Step Mechanism of Redox Systems with Inverted Potentials in Square-Wave Voltammetry

Gulaboski, Rubin (2023) Electrochemical-Catalytic EEC’ Mechanism Can Reveal Two-Step Mechanism of Redox Systems with Inverted Potentials in Square-Wave Voltammetry. [Experiment] (Unpublished)

Text (MATHCAD SIMULATION PROTOCOL) 1-EEC' of systems with inverted potentials-CULABOSKI.pdf - Draft Version Download (516kB)

Abstract

Many electrochemical processes of important systems (enzymes, redox proteins etc.) under physiological conditions occur in two successive electron transfer steps. If the energy of second electron tansfer is lower than that of the first electron transfer step, then both processes appear in a single voltammetric peak. By modeling two-step diffusional mechanism coupled with regenerative chemical reaction to the product of second electron transfer one gets so-called EEC’ (or EECat) mechanism. By making analysis associated with an increase of the kinetics of the regenerative chemical step, one obtains shift of the potential of the net-peak of second electron transfer step towards more negative potentials. At large rates of chemical regenerative reaction, one gets separation of both electron transfer steps that appear in two distinct peaks, separated by more than 100 mV. This is the frist time to explore the features of EEC’ mechanism to separate and distinguish between systems with inverted redox potentials in SWV.

Item Type:	Experiment
Subjects:	Natural sciences > Chemical sciences
Divisions:	Faculty of Medical Science
Depositing User:	Rubin Gulaboski
Date Deposited:	25 Dec 2023 11:51
Last Modified:	25 Dec 2023 11:51
URI:	https://eprints.ugd.edu.mk/id/eprint/33124

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