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Adsorption isotherm of ions on electrodes for solutions with constant ionic-strengthстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: Damaskin B., Palm U., Petyarv E., Salve M.
- Журнал: Journal of Electroanalytical Chemistry
- Том: 47
- Номер: 1
- Год издания: 1973
- Издательство: Elsevier Sequoia
- Местоположение издательства: Switzerland
- Первая страница: 127
- Последняя страница: 136
- DOI: 10.1016/0368-1874(73)80061-9
- Аннотация: In the present work the equation of the isotherm for describing the specific adsorption of ions on electrodes from the system of mixed electrolytes with constant ionic strength was derived. In the derivation the buffering effect of the diffuse part of the electrical double layer, which changes by varying the ratio between the surface-active and inactive components in the system, was taken into consideration. The experimental verification of the derived isotherm was carried out on a solid bismuth electrode by studying the specific adsorption of Cs+ from the aqueous and methanolic solutions of the mixed electrolytes LiCl and CsCl at the different values of the constant ionic strength (0.01, 0.03, 0.1, etc.). The adsorption of Cs+ was studied by the differential capacity measurement method. It was found on the basis of the data obtained that the derived isotherm can successfully be applied for the quantitative characterization of the specific adsorption of Cs+ on bismuth only if the assumptions made in the derivation of the isotherm are valid (the absence of specific adsorption of anions in the case of recharge of the electrode by the cations). In full agreement with the equation of the isotherm the graphical plots of. log(ε1{mc2)+(1-f)[logc+ 1 2m log m+ 1 2(1-m) log(1-m)]} against ε1 give at the constant charge one common line for different ionic strengths of the systems. The parameters of these plots give the constant of the adsorption equilibrium β and the second virial coefficient B. The constant β is, within the limits of experimental error, independent of the ionic strength of the solution, both for water and methanol, and depends linearly on the charge of the electrode. The specific adsorption of Cs+ is stronger from methanol than from the aqueous solutions. © 1973.
- Добавил в систему: Дамаскин Борис Борисович