Electrical double layer on liquid Sn-Ga alloy in aqueous solutionsстатья
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.
Аннотация:Double-layer parameters of a liquid Sn-Ga electrode in aqueous electrolyte solutions are studied. It is shown that Sn in the alloy with Ga is a surface-active component and is forced out onto a surface layer of the electrode. The double-layer parameters of an Sn-Ga electrode (8 at. % Sn), which are measured in the experimentally accessible range of charges, differ radically from the parameters of Ga electrodes and are close to those of Sn electrode. Hence, an Sn-Ga electrode containing 8 at. % Sn simulates electrochemical properties of a liquid Sn electrode. The difference between reciprocal "electronic" capacitances of Hg and Sn and a "corrected electrochemical work function" of Sn are determined. It is shown that the chemisorption interaction of an Sn-Ga electrode with water molecules is virtually absent at charges more negative than -7 μC/cm 2. A potential drop on uncharged Sn, which is associated with water chemisorption, is -20 mV. Thus, the hydrophilicity of Sn is slightly higher than that of Hg, Bi-Ga, Pb-Ga, and Tl-Ga and significantly lower than that of In-Ga, Cd-Ga, and Ga.