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The relation between the potential of zero charge and work function for sp-metalsстатья
Информация о цитировании статьи получена из
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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: 45
- Номер: 1
- Год издания: 2009
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 45
- Последняя страница: 57
- DOI: 10.1134/S1023193509010078
- Аннотация: It is shown that for numerous sp-metals there exists no unified work function (W e) dependence of the potential of zero charge E q = 0 and the potential drop characterizing the metal lyophilic behavior Δ MHg E chem) q = 0. The reason is that the metal work function is by no means the only factor affecting the value of E q = 0. The quantities E q = 0 and (Δ MHg E chem) q = 0 depend also on the distance of the solvent dipoles’ closest approach to metal surfaces (d ms) in the absence of the metal-solvent chemisorption interaction. When the metal-solvent chemisorption interaction is involved, this distance affects the degree of overlapping of the metal’s acceptor levels and the upper occupied donor levels in the solvent molecules. To reliably investigate the effect of any of these factors on E q = 0, the other one should be fixed up. It is shown, by example of Ga-, Bi-Gaand Sn-Ga-electrodes, as well as Pb-Ga-, In-Ga-, and Cd-Ga-electrodes demonstrating very close values of the "electrochemical work function" that the metal-solvent chemisorption interaction becomes stronger with the decreasing of d ms. The influence of this factor is intensified with the increasing of the solvent’s donor number DN. The W e dependence of E q = 0 and (Δ MHg E chem) q = 0 can be traced by example of metals with nearly equal d ms values, e.g., Tl-Ga, In-Ga, and Ga. In all studied solvents, the deviation of E q = 0 from W e increased in the series Tl-Ga < In-Ga < Ga, that is, with the increasing of the metal’s work function in vacuum. The effect is intensified with the increasing of the solvent’s DN. The obtained results agree with the concept of donor-acceptor nature of the metal-solvent chemisorption interaction. © 2009 Pleiades Publishing, Ltd.
- Добавил в систему: Дамаскин Борис Борисович