Mirceski, Valentin and Lovrić, Milivoj and Gulaboski, Rubin (2001) Theoretical and experimental study of the surface redox reaction involving interactions between the adsorbed particles under conditions of square-wave voltammetry. Journal of Electroanalytical Chemistry, 515 (1-2). pp. 91-100. ISSN 15726657
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Abstract
A surface redox reaction of a strongly adsorbed redox couple involving interactions between the adsorbed particles was
analyzed theoretically under conditions of square-wave voltammetry (SWV). If uniform interactions act between the adsorbed
particles, the effect of interaction forces is represented through the product of the relative surface coverage and Frumkin
interaction parameter �a. The kinetics of the redox reaction in the presence of uniform interactions are a function of the apparent
rate constant defined as ks,app.=ks exp(−2a�), where ks is a real standard rate constant. The apparent reversibility of the redox
reaction is determined solely by a dimensionless kinetic parameter defined as the ratio of the apparent rate constant and the signal
frequency, �=ks,app/f. This dimensionless kinetic parameter unifies the effects of both the interaction forces and the charge
transfer rate. The height of the dimensionless response depends parabolically on the kinetic parameter �, as a consequence of the
phenomenon known as a ‘quasireversible maximum’. Based on this peculiarity, a method for estimating the real standard rate
constant ks and Frumkin interaction parameter a is proposed. The theoretical results are compared qualitatively with the
experimental SW voltammograms of probucole.
| Item Type: | Article |
|---|---|
| Subjects: | Natural sciences > Chemical sciences Natural sciences > Physical sciences |
| Divisions: | Faculty of Agriculture |
| Depositing User: | Rubin Gulaboski |
| Date Deposited: | 31 Oct 2012 13:13 |
| Last Modified: | 05 Nov 2012 11:12 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/154 |
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