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Electrochemical Modification of Electrodes Based on Highly Oriented Carbon Nanowallsстатья
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: 2 декабря 2015 г.
- Авторы: Krivenko A.G., Komarova N.S., Stenina E.V., Sviridova L.N., Mironovich K.V., Shul’ga Yu M., Manzhos R.A., Doronin S.V., Krivchenko V.A.
- Журнал: Russian Journal of Electrochemistry
- Том: 51
- Номер: 10
- Год издания: 2015
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 1090
- Последняя страница: 1103
- DOI: 10.1134/S1023193515100079
- Аннотация: The original and modified vertically oriented carbon nanowalls (CNWs) were applied onto con ducting substrates by the plasmachemical method. Their electrochemical behavior was studied by the methods of cyclic voltammetry and impedance measurements. The modified and original electrodes were characterized by using the methods of scanning and transmitting electron microscopy, Raman spectroscopy, and Xray photoelectron spectroscopy. The nanowalls were modified with the functional groups (FG) via the electrolysis of aqueous solutions at the anodic potentials. Their adsorption properties were studied in the solutions of organic surfactants with the skeleton structure. It is shown that, in the first case, the number of oxygencontaining FG on the CNW surface significantly increases and, in both cases, the electrode capacitance considerably increases (by 30–50 and 3–5 times, respectively). A correlation between the rate constants k0 of [Ru(NH3)6]2+/3+, [Fe(CN)6]4–/3–, and Fe2+/3+ redox reactions and a degree of nanowall surface functionalization is revealed. The values of k0 were estimated in the automatic mode using a specially developed program by comparing the potential differences between the peaks of cyclic voltammograms ΔE, which were measured in a wide range of potential scan rate v, and the calculated ΔE (k0, v) dependences, which were obtained by solving the corresponding diffusion equations. It is shown that the functionalization of CNWs leads to a substantial (by ~103 times) increase in k0 for the Fe2+/3+ redox system and has almost no effect on the electron transfer in the [Fe(CN)6]3–/4– and [Ru(NH3)6] 2+/3+ systems. Keywords: cabon nanowalls, functionalization, adsorption, electron transfer, redox reactions, [Ru(NH3)6]2+/3+
- Добавил в систему: Свиридова Лиана Николаевна