The effect of microscopic partial charge-transfer during elementary adsorption on the impedance spectra of polarizable and nonpolarizable electrodes in solutions of binary electrolyteстатья
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.
Аннотация:The impedance spectra of the polarizable and nonpolarizable electrodes in solutions of binary electrolyte have been analyzed on the basis of the Grahame-Parsons model that was modified by adding the condition of microscopic partial charge transfer (in terms of Lorenz-Salie). For this purpose, we introduced the equations for the equilibrium differential capacitance C0, the limiting high-frequency capacitance C(infinity), the coefficient of macroscopic partial charge transfer n, the salt surface excesses in the combined scale of potentials, and the derivatives of this excess with respect to the full charge of the electrode and the chemical potential of the salt. It has been shown that an increase in the coefficient of microscopic charge transfer lambda characteristic of a microscopic chemical event of adsorption adds to the frequency spread of the polarized electrode capacitance. In the presence of the faradaic process an increase in the lambda causes ever increasing deviation of the impedance frequency spectra from the Randles-Ershler scheme.