Catalysis Letters

, Volume 8, Issue 5–6, pp 345–358

Homogeneous Rh-Sn alkoxide coatings on silica surfaces: A novel route for preparation of bimetallic Rh-Sn catalysts

  • S. L. Anderson
  • A. K. Datye
  • T. A. Wark
  • M. J. Hampden-Smith


The reaction of [{(COD)Rh}2Sn(OEt)6], where COD = 1,5-cyclooctadiene and Et = ethyl, with silanol groups on silica surfaces is shown to lead to near-monolayer coverage of the silica by the Rh-Sn organometallic compound. Heating the supported compound at 498 K yields a catalyst that is active for benzene hydrogenation at room temperature. When the catalyst is reduced in H2 at 823 K, the benzene hydrogenation activity increases with a simultaneous drop in the activity for n-butane hydrogenolysis. High temperature reduction leads to formation of Rh-Sn alloy particles with an average particle diameter of 2.5 nm. These particles are stable towards oxidation-reduction cycles involving oxidation at 773 K in 15% O2. When normalized to the benzene hydrogenation activity, the n-butane hydrogenolysis activity of the bimetallic catalyst is suppressed by over 3 orders of magnitude when compared to a monometallic Rh catalyst.


Rh-Sn catalyst bimetallic catalysts Rh-Sn alkoxide coatings silica surfaces hydrogenation activity 


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  1. [1]
    J.H. Sinfelt,Bimetallic Catalysts (Wiley, NY, 1978).Google Scholar
  2. [2]
    J.P. Candy, O.A. Ferretti, G. Mabilon, J. P. Bournonville, A. El Mansour, J.M. Basset and G. Martino, J. Catal. 112 (1988) 210.Google Scholar
  3. [3]
    B. Coq, A. Bittar, T. Tazi and F. Figueras, J. Mol. Catal. 55 (1989) 34.Google Scholar
  4. [4]
    J. Margitfalvi, S. Szabo and F. Nagy, Stud. Surf. Sci. Catal. 27 (1986) 373.Google Scholar
  5. [5]
    A.K. Datye, L.F. Allard and J. Schwank,Analytical Electron Microscopy (San Francisco Press, 1984) p. 205.Google Scholar
  6. [6] a:
    C. Dossi, R. Psaro, D. Roberto, R. Ugo and G. Zanderighi, Inorg. Chem. 29 (1990) 4368.Google Scholar
  7. [6] b:
    T. Schwartz, Acc. Chem. Res. 18 (1985) 302.Google Scholar
  8. [6] c:
    B.C. Gates, in:Organometallic Chemistry: Basis for the Design of Supported Catalysts', Catalyst Design, Progress and Perspectives, ed. L.L. Hegedus (John Wiley and Sons, New York, 1987).Google Scholar
  9. [7] a:
    V.W. Day and W.G. Klemperer, Science (Washington D.C.) 228 (1985) 533.Google Scholar
  10. [7] b:
    H.K. Chae, W.G. Klemperer and V.W. Day, Inorg. Chem. 28 (1989) 1423.Google Scholar
  11. [7] c:
    Y. Hayashi, T. Toriumi and K. Isobe, J. Am. Chem. Soc. 110 (1988) 3666.Google Scholar
  12. [7] d:
    R.G. Finke, B. Rapko and P.J. Domaille, Organometallics 5 (1984) 174.Google Scholar
  13. [7] e:
    R.G. Finke, D.K. Lyon, K. Nomiya, S. Sur and N. Mizuno, Inorg. Chem. 29 (1990) 1784.Google Scholar
  14. [7] f:
    D.K. Lyon and R.G. Finke, ibid 29 (1990) 1789.Google Scholar
  15. [7] g:
    M.T. Pope,Heteropoly and Isopoly Oxometallates, Inorganic Chemistry Concepts No. 8 (Springer-Verlag, New York, 1983; p. 118.Google Scholar
  16. [7] h:
    V.W. Day, W.G. Klemperer and D.J. Main, Inorg. Chem. 29 (1990) 2345.Google Scholar
  17. [7] i:
    W.G. Klemperer and D.J. Main, Inorg. Chem. 29 (1990) 2355.Google Scholar
  18. [8]
    See e.g. M.J. Hampden-Smith, D.S. Williams and A.L. Rheingold, Inorg. Chem. 29 (1990) 4076.Google Scholar
  19. [9] a:
    T.A. Wark, E.A. Gulliver, L.C. Jones, M.J. Hampden-Smith, A.L. Rheingold and J.C. Huffman,Better Ceramics Through Chemistry IV (Mat. Res. Soc. Symp.) in Press.Google Scholar
  20. [9] b:
    T.A. Wark, E.A. Gulliver, M.J. Hampden-Smith and A.L. Rheingold, Inorg. Chem. 29 (1990) 4360.Google Scholar
  21. [10]
    W. Stober and A. Fink, J. Coll. Interface Sci. 26 (1968) 62.Google Scholar
  22. [11]
    B.G. Linsen,Physical and Chemical Aspects of Adsorbents and Catalysts (Academic Press, New York, 1970) p. 260.Google Scholar
  23. [12]
    A.D. Logan and A.K. Datye, J. Phys. Chem., submitted.Google Scholar

Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1991

Authors and Affiliations

  • S. L. Anderson
    • 1
  • A. K. Datye
    • 1
  • T. A. Wark
    • 2
  • M. J. Hampden-Smith
    • 2
  1. 1.Center for Micro-Engineered Ceramics and Department of Chemical & Nuclear EngineeringUniversity of New MexicoAlbuquerqueUSA
  2. 2.Center for Micro-Engineered Ceramics and Department of ChemistryUniversity of New MexicoAlbuquerqueUSA
  3. 3.Department of Chemical & Nuclear Engg.Univ. of New MexicoAlbuquerqueUSA

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