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Effects of Specific Interaction of (In–Ga)-Electrode with 1-Propanol Molecules in Dense Part of the Electric Double Layerстатья
- Автор: Emets V.V.
- Журнал: Russian Journal of Electrochemistry
- Том: 58
- Номер: 11
- Год издания: 2022
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 968
- Последняя страница: 977
- Оригинальные версии: ЭФФЕКТЫ СПЕЦИФИЧЕСКОГО ВЗАИМОДЕЙСТВИЯ (In–Ga)-ЭЛЕКТРОДА С МОЛЕКУЛАМИ 1-ПРОПАНОЛА В ПЛОТНОЙ ЧАСТИ ДВОЙНОГО ЭЛЕКТРИЧЕСКОГО СЛОЯ
- DOI: 10.1134/s1023193522110064
- Аннотация: Differential capacitance curves and the zero-charge potentials on liquid renewable (In–Ga)- (14.2 at % In) and Hg-electrodes in solutions with different concentrations of a surface-inactive electrolyte in 1-propanol (1-PrOH) were obtained using an alternating current bridge and the jet electrode method at 32°С. The structure of the electric double layer at the (In–Ga)/1-PrOH and Hg/1-PrOH interfaces is shown to differ, which is due to the influence of the metal nature on both the chemisorption and the metal–1-PrOH physical interaction. The passing from Hg to (In–Ga) is accompanied by a decrease in the distance of the closest approach of the PrOH dipoles to the metal surface and an increase in the metal–1-PrOH chemisorption interaction. The 1-PrOH chemisorption at the (In–Ga) electrode shifts the zero-charge potential toward negative values, which suggests that chemisorbed 1-PrOH dipoles are oriented with their negative (oxygen) ends to the metal surface. Comparison of the experimental results on (In–Ga)- and Hg-electrodes in water, MeOH, EtOH, and 1-PrOH showed that the replacement of one of the hydrogen atoms in the water molecule by an aliphatic radical upon passing to MeOH and the subsequent increase in the radical length upon further passing to EtOH and 1-PrOH affects the shape of the charge dependence of the parameters reflecting the chemisorption specificity of the metal–solvent contact. With increase in the aliphatic radical length, the (In– Ga)–alcohol chemisorption interaction manifests itself at less negative values of the charge density, and the values of the solvent chemisorption potential drop on the (In–Ga)-electrode increased in the series H2O < MeOH < EtOH < (1-PrOH) due to an increase in the donor number of the solvent. The length of the aliphatic radical in the alcohol molecule is shown not to affect the parameters characterizing the physical specifics of the metal–solvent contact, but changes the charge window in which these parameters are recorded. Differential capacitance curves and zero-charge potentials of (In–Ga) electrode in 0.1 M solutions of LiCl, LiBr, and LiI in 1-propanol are obtained. The specific adsorption of halide anions at the (In–Ga)/(1-PrOH) interface is shown to increase in the sequence Cl– < Br– < I–.
- Добавил в систему: Емец Виктор Владимирович