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Specific Features of the Formation of Pt(Cu) Catalysts by Galvanic Displacement with Carbon Nanowalls used as Supportстатья
Статья опубликована в высокорейтинговом журнале
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: 11 сентября 2012 г.
- Авторы: Podlovchenko B.I., Krivchenko V.A., Maksimov Yu M., Gladysheva T.D., Yashina L.V., Evlashin S.A., Pilevsky A.A.
- Журнал: Electrochimica Acta
- Год издания: 2012
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- DOI: 10.1016/j.electacta.2012.04.124
- Аннотация: Microamounts of Cu are applied by the methods of electrodeposition (Cued) and magnetron sputtering (Cuspr) on a new carbon material, carbon nanowalls (CNW). The galvanic displacement (GD) of Cued and Cuspr in a PtCl42в€’ solution (with 0.5 Рњ H2SO4 as the supporting electrolyte) produces Pt(Cu)/CNW catalysts. The possibility of using open-circuit potential transients recorded in the course of GD for monitoring the surface layer composition is considered. The stable Pt(Cu)st samples are characterized by several methods (SEM, TEM, XPS, voltammetry, etc.). It is shown that Pt(Cu)st has structure of the core(Pt, Cu)-shell(Pt) type with the average atomic ratio Pt: Cu (%) в€ј 57: 43 for Cued and в€ј 80: 20 for Cuspr. The formation of the dense Pt shell is also confirmed by the data on the electrocatalytic activity of synthesized samples in the methanol oxidation reaction. The reasons for deviations in the properties of Pt(Cu)st/CNW samples formed from Cued and Cuspr are discussed. The high specific surfaces of the Pt(Cu)st/CNW catalyst obtained from Cued (>40 m2/g Pt) with the simultaneous decrease in the Pt content makes this material promising for using in the platinum-catalyzed processes (particularly, in fuel cells).
- Добавил в систему: Кривченко Виктор Александрович