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Distinctive features of supported catalysts prepared from platinum carbonyl clusters

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Abstract

The formation of Pt/γ-Al2O3 and Pt/C catalysts from platinum carbonyl clusters H2[Pt3(CO)6]n (n = 2, 5) is studied. The strength of interaction between clusters (strong Lewis bases) and the support and the state of platinum in catalysts are governed by the acceptor strength of the support. The formation of a stable platinum compound with a surface of γ-Al2O3 (strong Lewis acid) is shown for a Pt/γ-Al2O3 catalyst by the method of radial distribution functions. In a Pt/C catalyst containing the same amount of Pt supported on a carbon material known to be a weaker acceptor, metallic platinum is formed along with surface-bonded platinum. Proceeding from the existence of the active phase of catalysts in the form of a surface platinum complex and platinum crystallites, the properties of catalysts are discussed in the complete oxidation of methane and the dehydrogenation of cyclohexane, as well as the high dispersity of platinum and its thermal stability

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Authors and Affiliations

  1. Boreskov Institute of Catalysis (Omsk Branch), Siberian Division, Russian Academy of Sciences, 644053, Omsk, Russia

    N. B. Shitova, V. A. Drozdov, P. E. Kolosov & M. D. Smolikov

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  1. N. B. Shitova
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  2. V. A. Drozdov
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  3. P. E. Kolosov
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  4. M. D. Smolikov
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Shitova, N.B., Drozdov, V.A., Kolosov, P.E. et al. Distinctive features of supported catalysts prepared from platinum carbonyl clusters. Kinet Catal 41, 720–728 (2000). https://doi.org/10.1007/BF02754573

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  • DOI: https://doi.org/10.1007/BF02754573

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