Assessing the Kinetics of Regenerative Reaction from Catalytic Wave in Square-Wave Voltammetry of an EC’ mechanism

Gulaboski, Rubin (2021) Assessing the Kinetics of Regenerative Reaction from Catalytic Wave in Square-Wave Voltammetry of an EC’ mechanism. [Dataset] (Unpublished)

Slideshow (MATHCAD simulation results of EC' Mechanism) Surface EC' catalytic wave 2021 july Gulaboski.pdf - Presentation Download (558kB)

Abstract

The so-called electrochemical-regenerative mechanism (or EC' mechanism) is one of the most studied under voltammetric conditions. The irreversible chemical regenerative reaction between the final product of an electrochemical transformation and a given substrate "Y" gives rise to a multiple redox transformation that is portrayed in an elevated current in voltammetry. Depending on the ratio between the rate of electron transfer vs the rate of the regenerative chemical reaction, various voltammetric patterns can be recognized at this important mechanism under voltammetric conditions. In this work we show that a very efficent access to the rate of regenerative chemical reaction can be obtained, following on the appearance of "catalytic post-wave" that is due to the additional supply of electroactive material, in situation of comparable rates of electron transfer step and the regenerative reaction. Since this catalytic wave appears in regions of 0.02 < Kcatalytic < 0.05, a very precise determination of regenerative rate constant can be achieved if the catalytic wave is observed experimentally. This can be achieved in voltammetric experiments performed at constant frequency, and by modifying the concentration of substrate (regenerative compound "Y") only. We demonstrate the features of this phenomenon at a surface EC' mechanism under conditions of square-wave voltammetry.

Item Type:	Dataset
Subjects:	Natural sciences > Chemical sciences Natural sciences > Physical sciences
Divisions:	Faculty of Medical Science
Depositing User:	Rubin Gulaboski
Date Deposited:	12 Jul 2021 05:59
Last Modified:	12 Jul 2021 05:59
URI:	https://eprints.ugd.edu.mk/id/eprint/28294

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