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    Öğe
    Application of a cyclic renewable silver amalgam liquid film electrode (R-AgLAFE) to study the electroreduction processes of Bi(III) ions in the presence of cysteine
    (2022) Nosal-Wierci?ska, Agnieszka; Martyna, Marlena; Wi?niewska, Ma?gorzata; Yılmaz, Selehattin; Denizhan, Nuray
    The cyclically refreshable liquid silver amalgam film silver-based electrode (R-AgLAFE) to study electrode processes under the “cap-pair” conditions were used. The effects of cysteine on the kinetics and the mechanism of Bi(III) electroreduction in chlorates(VII) have been studied. The methodology of the study is based on electrochemical methods: DC polarography, square wave voltammetric (SWV), and cyclic voltammetric (CV). The magnitude of the catalytic effect is related to the formation of the $Bi(III)-Hg(SR)_2$ active complexes mediating electron transfer equilibrium. This reaction controls the total rate of the process.
  • [ X ]
    Öğe
    Electrochemical Measurements of the In(III) Ions Electroreduction; the Influence of Mixed Adsorption Layers ACT-CTAB and ACT-SDS
    (Electrochemical Soc Inc, 2024) Martyna, Marlena; Nosal-Wiercinska, Agnieszka; Yagmur-Kabas, Sultan
    Using voltammetric and impedance methods, the effects of mixed adsorption layers ACT-CTAB and ACT-SDS on the kinetics and mechanism of In(III) ions electroreduction were investigated. Acetazolamide (ACT) was shown to catalyse the course of the electrode reaction (according to the cap-pair rule). The multi-step nature of the In(III) ions electroreduction process in each of the systems studied in the chemical step of formation of the active In(III) - ACT complexes in the adsorption layer playing an important role is demonstrated. The presence of the cationic surfactant CTAB increases the dynamics of acceleration of the In(III) ion electroreduction process by ACT, while the presence of the anionic surfactant SDS inhibits this reaction.
  • Küçük Resim
    Öğe
    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
    (MDPI, 2023) Nosal-Wiercinska, Agnieszka; Martyna, Marlena; Pawlak, Alicja; Bazan-Wozniak, Aleksandra; Pietrzak, Robert; Yılmaz, Selehatin; Yağmur Kabaş, Sultan
    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 (Formula presented.) point to the catalytic activity of ACT in the In(III) ions electroreduction process in chlorates(VII). Analysis of the standard entropy values (Formula presented.) confirm changes in the dynamics of the electrode process.