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Dimensional Effects in the Carbidization of Supported Iron Nanoparticles

Authors

  • Prof. Petr A. Chernavskii,

    Corresponding author
    1. Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow (Russia)
    • Petr A. Chernavskii, Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow (Russia)

      Andrei Y. Khodakov, Unité de Catalyse et de Chimie du Solide, USTL-ENSCL-EC LIlle, Bât. C3, Cite Scientifique, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61

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  • Dr. Vladimir I. Zaikovskii,

    1. Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, Novosibirsk (Russia)
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  • Dr. Galina V. Pankina,

    1. Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow (Russia)
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  • Dr. Andrei Y. Khodakov

    Corresponding author
    1. Unité de Catalyse et de Chimie du Solide, USTL-ENSCL-EC LIlle, Bât. C3, Cite Scientifique, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61
    • Petr A. Chernavskii, Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow (Russia)

      Andrei Y. Khodakov, Unité de Catalyse et de Chimie du Solide, USTL-ENSCL-EC LIlle, Bât. C3, Cite Scientifique, 59655 Villeneuve d'Ascq (France), Fax: (+33) 3-20-43-65-61

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Abstract

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Iron-clad results: The effect of nanoparticle size on the kinetics of iron carbidization on silica-supported catalysts was studied by using an in situ magnetic method combined with simultaneous analysis of the reaction products. The activation energy of carbide formation in both CO and syngas grew with a decrease in the particle size of iron: Smaller iron carbide particles (d=9 nm) appear to be less stable than their larger counterparts.

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