Catalysis Letters

, Volume 21, Issue 1–2, pp 183–189 | Cite as

Evidence for strong metal-support interaction (SMSI) in Rh/TiO2 system

  • V. Vishwanathan
  • S. Narayanan
Article

Abstract

Rh(1 wt%)/TiO2 samples were prepared by both incipient wetness and ion-exchange methods and were characterised by temperature programmed desorption (TPD), electron spin resonance (ESR), mass spectrometry (MS) and hydrogen chemisorption. The incipient wetness sample was found to be more favourable for the onset of SMSI state. The reduction of Ti4+ to Ti3+ during hydrogen spillover or due to the lattice oxygen (O2−) deficiency seemed to be responsible for the SMSI state. A mechanistic pathway is proposed to explain the onset of SMSI behaviour.

Keywords

Rh/TiO2 SMSI state incipient/ion-exchange methods lattice oxygen (O2−) deficiency catalyst characterisation 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    S.J. Tauster, S.C. Fung and R.L. Garten, J. Am. Chem. Soc. 100 (1978) 170.Google Scholar
  2. [2]
    G.C. Bond, Specialist Periodical Report 6 (1983) 27.Google Scholar
  3. [3]
    D. Resasco and G. Haller, J. Chem. Soc. Chem. Commun. (1980) 1150.Google Scholar
  4. [4]
    R. Burch and A.R. Flambard, J. Chem. Soc. Chem. Commun. (1981) 965.Google Scholar
  5. [5]
    V. Vishwanathan, J. Chem. Soc. Chem. Commun. (1989) 848.Google Scholar
  6. [6]
    W. Curtis Connor Jr., G.M. Pajonk and S.J. Teichner, in:Advances in Catalysis, Vol. 34, eds. D.D. Eley, H. Pines and P.B. Weisz (Academic Press, New York, 1986) p. 1.Google Scholar
  7. [7]
    J.M. Hermann, J. Catal. 78 (1982) 425; 89 (1984) 404; 94 (1985) 587.Google Scholar
  8. [8]
    E.S. Shpiro, B.B. Dysembia, O.P. Tkachenko, G.V. Antoshin and Kh.M. Minachev, J. Catal. 110 (1988) 262.Google Scholar
  9. [9]
    S. Narayanan, J. Sci. Ind. Res. 44 (1985) 580.Google Scholar
  10. [10]
    V. Vishwanathan and S. Narayanan, React. Kinet. Catal. Lett. 45 (1991) 155;Google Scholar
  11. [10] a
    F. Solymosi, Catal. Rev. 1 (1967) 233; J. Catal. 94 (1985) 581.Google Scholar
  12. [11]
    H.C. Zur Loye and A.M. Stacy, J. Am. Chem. Soc. 107 (1985) 4567;Google Scholar
  13. [11] a
    H.C. Zur Loye, T.A. Faltens and A.M. Stacy, J. Am. Chem. Soc. 108 (1986) 8104;Google Scholar
  14. [11] b
    V. Vishwanathan, S. Narayanan, T. Lakshmi and B. Viswanathan, Ind. J. Technol. 30 (1992) 104.Google Scholar
  15. [12]
    V. Vishwanathan and S. Narayanan, J. Chem. Soc. Chem. Commun. (1988) 1233.Google Scholar
  16. [13]
    R.I. Bickley and R.K.M. Jayanthy, Discussions Faraday Soc. 52 (1971) 226.Google Scholar
  17. [14]
    D.J.C. Yates, J. Phys. Chem. 65 (1981) 746;Google Scholar
  18. [14] a
    M. Primet, P. Pichat and M. Matheiw, J. Phys. Chem. 75 (1971) 226.Google Scholar
  19. [15]
    M.A. Enriquez, C. Doremleux-Morin and J. Fraissard, J. Solid State Chem. 40 (1981) 233.Google Scholar
  20. [16]
    H.P. Boehm, Adv. Catal. 16 (1966) 249.Google Scholar
  21. [17]
    R.I. Bickley and V. Vishwanathan, unpublished.Google Scholar
  22. [18]
    V. Vishwanathan, S. Narayanan and B. Vishwanathan, Ind. J. Chem. 26A (1987) 686.Google Scholar
  23. [19]
    M.A. Vannice and C. Sudhaka, J. Phys. Chem. 88 (1984) 2429.Google Scholar
  24. [20]
    V. Vishwanathan, S. Narayanan and B. Vishwanathan, Ind. J. Chem. 29A (1990) 841.Google Scholar

Copyright information

© J.C. Baltzer AG, Science Publishers 1993

Authors and Affiliations

  • V. Vishwanathan
    • 1
  • S. Narayanan
    • 1
  1. 1.Catalysis SectionIndian Institute of Chemical TechnologyHyderabadIndia

Personalised recommendations