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Compacts of Boron-Doped Synthetic Diamond: Acceleration of Cathodic Reactions by Plasma-Assisted and Electrochemical Treatment of the Electrodesстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 6 июля 2022 г.
- Авторы: Krivenko A.G., Manzhos R.A., Kochergin V.K., Kotkin A.S., Pleskov Yu V., Krotova M.D., Ekimov E.A.
- Журнал: Russian Journal of Electrochemistry
- Том: 58
- Номер: 6
- Год издания: 2022
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 520
- Последняя страница: 527
- DOI: 10.1134/S1023193522050068
- Аннотация: Diamond compacts were synthesized by thermobaric processing of graphite and boron mixturesunder the conditions of the diamond thermodynamic stability (at a pressure of 8–9 GPa and temperature of∼2500 K). The boron-doped diamond-compact electrode surface was modified by its subjecting to the actionof cathodic, anodic, and cathodic–anodic electrolytic plasma formed under the applying of voltage pulseswith amplitude up to 300 V in Na2SO4 aqueous solution. It was found by using rotating disc electrode that theapplying of sole cathodic–anodic plasma provides negligible catalytic effect with respect to the oxygen reductionreaction. However, thus pre-processed electrode acquired significant electrocatalytical activity upon thecathodic treatment, with the consequence that the reaction of O2 reduction to H2O passed predominantly bythe four-electron mechanism. At the same time, the cathodic polarization of the plasma-modified electrodeproduced no effect on the rate constant of the electron transfer in the [Ru(NH3)6]2+/3+ redox couple; yet, therate constant in the [Fe(CN)6]4–/3– one increased significantly. Hypothetically, the observed electrocatalyticaleffect in the oxygen reduction reaction is due to the formation, under the combined action of thecathodic–anodic plasma and cathodic polarization, of quinone groups at the boron-
- Добавил в систему: Плесков Юрий Викторович