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Comparative study of Cl-, Br-, and I- ion adsorption from N-methylformamide at Ga-, (In-Ga)-, and (Tl-Ga)-electrodesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Emets V.V., Damaskin B.B.
- Журнал: Russian Journal of Electrochemistry
- Том: 47
- Номер: 2
- Год издания: 2011
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 121
- Последняя страница: 128
- DOI: 10.1134/S1023193511020066
- Аннотация: Adsorption of Cl-, Br-, and I- (Hal -) ions from their 0.1 M solutions in N-methylformamide, a solvent with the highest permittivity (182.4 at 25°C), at liquid Ga-, (In-Ga)-, and (Tl-Ga)-electrodes with refreshable surface was studied by the measuring of differential capacitance and by using an open-circuit jet electrode. It is shown that the adsorption parameters and the surface activity series depend significantly on the metal nature. For the (In-Ga)- and (Tl-Ga)-electrodes, like for Hg-electrode, the halogenide-ion sur-face activity increases in the following series: Cl- < Br- < I-; for the Ga-electrode, it varies in the opposite sequence: I- < Br - < Cl-. By example of the Ga-electrode in N-methylformamide, it is shown for the first time that the phenomenon of the surface activity series reversal can be observed not only in aprotic solvents but also in protonic ones. The data obtained in N-methylformamide is compared with that obtained in dim-ethyl formamide and acetonitrile. The halogenide-ion adsorption at the Ga-, (In-Ga)-, and (Tl-Ga)-elec-trodes decreases in the series N-methylformamide < dimethyl formamide < acetonitrile. The results in aggre-gate are explained in terms of the Andersen-Bockris model. The data obtained in N-methylformamide, dim-ethyl formamide, and acetonitrile evidence the increase of δGM-Hal in the series (Tl-Ga) < (In-Ga) < Ga, that is, with the increasing of the metal work function. This points out the donor-acceptor nature of the metal-halogenide-ion interaction, in which the halogenide-ions are donors of electron pair with respect to the metals. © Pleiades Publishing, Ltd., 2011.
- Добавил в систему: Дамаскин Борис Борисович