Nanostructured PtZn intermetallic compound: Controlled formation from PtZn(CH3COO)4 molecular precursor and tests of catalytic properties

Phase transformations of a newly synthesized heterobimetallic ZnPt(OOCMe)4(H2O)(MeCOOH)2 acetate in a chemically reductive atmosphere at mildly elevated temperatures are thoroughly studied in order to optimize conditions for the formation of nanostructured PtZn intermetallic compound. According to XAFS and XRD data, the first stage of reductive thermolysis is the reduction of the noble metal, while zinc remains in an oxygen environment. At the second stage the reduction of Zn and the formation of the bimetallic solid solution with the fcc lattice occur. It is shown that recrystallization of solid solution to ordered PtZn intermetallic compound with the tetragonal structure occurs in a narrow temperature range of 250–275 °C. Based on these results, the optimum reduction temperature for the preparation of supported bimetallic Pt–Zn/Al2O3 catalyst was determined to be 300 °C. Results of catalytic tests of the supported material are reported. © 2021 Elsevier Ltd

Авторы
Smirnova N.S.1 , Khramov E.V. 2 , Stolarov I.P.1 , Yakushev I.A.1 , Baeva G.N.3 , Bragina G.O.3 , Belova E.V.4 , Ishchenko A.V.5 , Popova A.S. 6 , Zubavichus Y.V. 5 , Vargaftik M.N.1 , Stakheev A.Y.3
Журнал
Издательство
Elsevier Ltd
Язык
Английский
Статус
Опубликовано
Номер
107160
Том
132
Год
2021
Организации
  • 1 Kurnakov Institute of General and Inorganic Chemistry RAS, Leninsky prospect, 31Moscow 119991, Russian Federation
  • 2 National Research Center «Kurchatov Institute», Akademika Kurchatova pl., 1Moscow 123182, Russian Federation
  • 3 Zelinsky Institute of Organic Chemistry RAS, Leninsky prospect, 47Moscow 119991, Russian Federation
  • 4 Lomonosov Moscow State University, Leninskie Gory, 1Moscow 119991, Russian Federation
  • 5 Boreskov Institute of Catalysis SB RAS, 630090, Novosibirsk, Lavrentiev Ave., 5, Russian Federation
  • 6 Peoples' Friendship University of Russia, Miklukho-Maklaya str.6Moscow 117198, Russian Federation
Ключевые слова
Alloys; Intermetallic compound; Materials characterization; Nanocomposites; Phase transformation; Synchrotron X-Ray diffraction
Дата создания
20.04.2021
Дата изменения
20.04.2021
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/71983/
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