Nonlinear impedance of liquid In-Ga electrode in aqueous solutions of a symmetrical surface-inactive electrolyteстатья
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. ,
Mishuk V.Ya ,
Damaskin B.B. ,
Elkin V.V. ,
Grafov B.M.
Журнал:
Russian Journal of Electrochemistry
Том:
37
Номер:
10
Год издания:
2001
Издательство:
Maik Nauka/Interperiodica Publishing
Местоположение издательства:
Russian Federation
Первая страница:
1108
Последняя страница:
1114
DOI:
10.1023/A:1012387501025
Аннотация:
Experimental data related to the potential dependence of nonlinear characteristics of the electrical double layer at a liquid In-Ga electrode in aqueous solutions of a symmetrical surface-inactive electrolyte are obtained for the first time. It is shown that, as opposed to polycrystalline Cd and Pb electrodes, on a liquid (atomically smooth) In-Ga electrode, as on Hg, there is a clear intersection of the potential dependences of a nonlinear signal for different concentrations of a 1-1-valence surface-inactive electrolyte at one point. The intersection point exactly corresponds to the potential of zero charge of an electrode undistorted by specific adsorption of ions. It is established that, when estimating hydrophilicity of metals by a nonlinear impedance method, most information is provided by the region of average negative charges, rather than by the region near zero charge. It is shown that, as opposed to a linear impedance method, the nonlinear impedance method makes it possible to determine, directly from experiment, quantities that directly characterize the metal-solvent chemisorption interaction in a pure form; at the same time, these quantities are criteria of lyophilic nature of metals. Quantities that characterize the metal-solvent chemisorption interaction, obtained by the linear and nonlinear impedance methods are in good agreement, which confirms the validity of the approach we proposed earlier for separating the difference between reciprocal capacitances of the inner part of the electrical double layer on Hg and metal M, Δ M HgC i -1 = 1/C i Hg - 1/C i M into physical (Δ M Hg C -1) phys and chemical constituents. This coincidence also confirms correctness of numerical values obtained earlier for quantities (Δ M Hg C -1) phys. © 2001 MAIK "Nauka/Interperiodica".
Добавил в систему:
Дамаскин Борис Борисович