Estimation of continuity of electroactive inorganic films based on apparent anti-Ohmic trend in their charge transfer resistance

Komkova, M.A.; Karpova, E.V.; Sukhorukov, G.A.; Sadovnikov, A.A.; Karyakin, A.A.

Статья опубликована в высокорейтинговом журнале

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: 30 декабря 2016 г.

Авторы: Komkova Maria A., Karpova Elena V., Sukhorukov Grigory A., Sadovnikov Alexey A., Karyakin Arkady A.
Журнал: Electrochimica Acta
Том: 219
Год издания: 2016
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Первая страница: 588
Последняя страница: 591
DOI: 10.1016/j.electacta.2016.09.145
Аннотация: We report on the microscopy-free, pure electrochemical approach for estimation of the continuity of electroactive inorganic films. Impedance spectra of the transition metal hexacyanoferrate films, electrochemically deposited under the optimized conditions, have been fitted to the Randles-type equivalent circuit, complicated by diffusion impedance with reflective boundary conditions, connected in series to the charge transfer resistance. An apparent anti-Ohmic trend is revealed in the sharp decrease of the latter with an increase in amount of the deposited inorganic film commonly presuming its thickness. Assigning charge transfer resistance to the resistance of the electrode|film interface, its observed decrease with subsequent saturation is explained in terms of an increase of the interface area until the entire electrode is covered with the inorganic film completely. Scanning electron microscopy (SEM) confirms the “anti-Ohmic” and saturation regions correspond to the partially covered and fully covered electrode surfaces, respectively. The dependence of charge transfer resistance on the amount of the deposited film thus provides an estimation of the continuity of inorganic films, which is highly important in a view of their practical applications. Except for cost efficiency, microscopy-free tools are attractive because in some cases, for instance for recessed electrodes, microscopy is hardly applicable.
Добавил в систему: Карякин Аркадий Аркадьевич

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Estimation of continuity of electroactive inorganic films based on apparent anti-Ohmic trend in their charge transfer resistanceстатья

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