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Kinetics and Mechanism of In(III) Ions Electroreduction on Cyclically Renewable Liquid Silver Amalgam Film Electrode: Significance of the Active Complexes of In(III)—Acetazolamide

Authors :
Agnieszka Nosal-Wiercińska
Marlena Martyna
Alicja Pawlak
Aleksandra Bazan-Woźniak
Robert Pietrzak
Selehatin Yilmaz
Sultan Yağmur Kabaş
Anna Szabelska
Source :
Molecules, Vol 28, Iss 7, p 2942 (2023)
Publication Year :
2023
Publisher :
MDPI AG, 2023.

Abstract

The results of kinetic measurements revealed an accelerating effect of acetazolamide (ACT) on the multistep In(III) ions electroreduction in chlorates(VII) on a novel, cyclically renewable liquid silver amalgam film electrode (R–AgLAFE). The kinetic and thermodynamic parameters were determined by applying the DC polarography, square-wave (SWV) and cyclic voltammetry (CV), as well as electrochemical impedance spectroscopy (EIS). It was shown that ACT catalyzed the electrode reaction (“cap-pair” effect) by adsorbing on the surface of the R–AgLAFE electrode. The catalytic activity of ACT was explained as related to its ability to form active In(III)- acetazolamide complexes on the electrode surface, facilitating the electron transfer process. The active complexes constitute a substrate in the electroreduction process and their different structures and properties are responsible for differences in the catalytic activity. The determined values of the activation energy ΔH≠ point to the catalytic activity of ACT in the In(III) ions electroreduction process in chlorates(VII). Analysis of the standard entropy values ΔS0 confirm changes in the dynamics of the electrode process.

Details

Language :
English
ISSN :
14203049
Volume :
28
Issue :
7
Database :
Directory of Open Access Journals
Journal :
Molecules
Publication Type :
Academic Journal
Accession number :
edsdoj.290dfbaafb8e47b295fac0742ba7d60f
Document Type :
article
Full Text :
https://doi.org/10.3390/molecules28072942