Ceria-Based Fluorite-Like Oxide Solid Solutions as Catalysts of Methane Selective Oxidation into Syngas by the Lattice Oxygen: Synthesis, Characterization and Performance Научная публикация
Конференция |
3rd Asia-Pacific Congress on Catalysis 12-15 окт. 2003 , Dalian |
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Журнал |
Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308 |
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Вых. Данные | Год: 2004, Том: 93-95, Страницы: 45-53 Страниц : 9 DOI: 10.1016/j.cattod.2004.05.016 | ||||||||
Ключевые слова | Ceria doped by Sm or Bi, EXAFS, FTIRS, Methane selective oxidation into syngas, Raman, RED, Sructural and surface properties, Surface/lattice oxygen mobility and reactivity, TEM, UV-vis, XRD | ||||||||
Авторы |
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Организации |
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Информация о финансировании (4)
1 | Сибирское отделение Российской академии наук | 110 |
2 | Международный научно-технический центр | 2529 |
3 | Сибирское отделение Российской академии наук | 39 |
4 | International Association for the Promotion of Co-operation with Scientists from the New Independent States of the Former Soviet Union | 01-2162 |
Реферат:
Polymerized precursor route [M.P. Pechini, US Patent 3, 330 (1967) 697] was applied for synthesis of dispersed ceria-based solid solutions Ce1−xMex3+O3−y (Me3+= Sm3+ or Bi3+, x up to 0.5). The surface properties of those samples were modified by supporting Pt. Their bulk and surface structural features were characterized by using XRD, TEM, EXAFS, X-ray wide angle scattering (RED), UV–vis, Raman, FTIRS of lattice modes and adsorbed CO. To elucidate factors controlling the surface/bulk oxygen mobility and reactivity, these results were compared with the data of‘ the oxygen isotope exchange and/or H2/CH4 temperature-programmed reduction (TPR). Single-phase fluorite-like solid solutions with a nanodomain microstructure are characterized by distortion of the coordination polyhedra caused by dopants followed by the lattice local rearrangement into that of a lower symmetry at a high dopant content. The highest performance in methane selective oxidation into syngas by the lattice oxygen is found for samples where isolated oxygen vacancies dominate. Earlier studied Pt/Ce–Zr–La–O system [Stud. Surf. Sci. Catal. 143 (2002) 659; T.G. Kuznetsova, V.A. Sadykov, S.A. Veniaminov, G.M. Alikina, E.A. Paukshtis, Ya.N. Kulikova, E.M. Moroz, E.B. Burgina, V.A. Rogov, V.N. Kolomiichuk, V.V. Kriventsov, D.I. Kochubei, O.N. Martyanov, V.F. Yudanov, I.S. Abornev, S. Neophytides, ISO22, Europacat VI, September 2003, Innsbruck, Austria] has a lower oxygen mobility, is less stable in redox cycles and less selective for syngas. Bi–Ce–O system mainly combusts methane and is irreversibly decomposed by deep reduction due to metallic Bi evaporation.
Библиографическая ссылка:
Sadykov V.A.
, Kuznetsova T.G.
, Alikina G.M.
, Frolova Y.V.
, Lukashevich A.I.
, Potapova Y.V.
, Muzykantov V.S.
, Rogov V.A.
, Kriventsov V.V.
, Kochubei D.I.
, Moroz E.M.
, Zyuzin D.I.
, Zaikovskii V.I.
, Kolomiichuk V.N.
, Paukshtis E.A.
, Burgina E.B.
, Zyryanov V.V.
, Uvarov N.F.
, Neophytides S.
, Kemnitz E.
Ceria-Based Fluorite-Like Oxide Solid Solutions as Catalysts of Methane Selective Oxidation into Syngas by the Lattice Oxygen: Synthesis, Characterization and Performance
Catalysis Today. 2004. V.93-95. P.45-53. DOI: 10.1016/j.cattod.2004.05.016 WOS Scopus РИНЦ
Ceria-Based Fluorite-Like Oxide Solid Solutions as Catalysts of Methane Selective Oxidation into Syngas by the Lattice Oxygen: Synthesis, Characterization and Performance
Catalysis Today. 2004. V.93-95. P.45-53. DOI: 10.1016/j.cattod.2004.05.016 WOS Scopus РИНЦ
Даты:
Опубликована online: | 9 июл. 2004 г. |
Опубликована в печати: | 1 сент. 2004 г. |
Идентификаторы БД:
Web of science | WOS:000223973200007 |
Scopus | 2-s2.0-4344592022 |
РИНЦ | 13458189 |
Chemical Abstracts | 2004:741410 |
Chemical Abstracts (print) | 141:425962 |
OpenAlex | W2013192989 |