Reaction Kinetics and Catalysis Letters

, Volume 56, Issue 1, pp 3–13 | Cite as

Evidence for a surface reaction between H and CO adsorbed on polycrystalline Pt

  • Gar B. Hoflund
  • Charles K. Mount
  • Richard E. Gilbert
Article

Abstract

Temperature programmed desorption (TPD) experiments have been performed after dosing an ion-sputtered and annealed polycrystalline Pt surface with CO and H2. The CO-dosing was done both sequentially and simultaneously. With increasing residence time on the surface, the H2-TPD spectra exhibit conversion of the original H2-like features to features similar to the CO-TPD peaks. This provides evidence for the formation of a CO/H surface species through a chemical reaction between adsorbed H and adsorbed CO. The reaction occurs more rapidly when the sample is dosed or held at elevated temperatures, indicating that the reaction is activated.

Keywords

Physical Chemistry Catalysis Elevated Temperature Surface Reaction Temperature Program Desorption 

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References

  1. 1.
    Z. Paál, P. G. Menon (editors): Hydrogen Effects in Catalysis: Fundamentals and Practical Applications. Marcel Dekker, New York 1988.Google Scholar
  2. 2.
    S. D. Gardner, G. B. Hoflund, D. R. Schryer, B. T. Upchurch:J. Phys. Chem.,95, 835 (1991).CrossRefGoogle Scholar
  3. 3.
    J. E. Drawdy, G. B. Hoflund, S. D. Gardner, E. Yngvadottir, D. R. Schryer,Surface Inter. Anal.,16, 369 (1990).CrossRefGoogle Scholar
  4. 4.
    D. R. Schryer, B. T. Upchurch, B. D. Sidney, K. G. Brown, G. B. Hoflund, R. K. Herz:J. Catal.,130, 314 (1991).CrossRefGoogle Scholar
  5. 5.
    D. R. Schryer, B. T. Upchurch, J. D. Van Norman, K. G. Brown, J. Schryer:J. Catal.,122, 193 (1990).CrossRefGoogle Scholar
  6. 6.
    M. F. R. Mulcahy: Gas Kinetics. John Wiley and Sons, New York 1973.Google Scholar
  7. 7.
    Y. Y. Tong, J. J. van der Klink:J. Phys. Chem.,98, 11011 (1994).CrossRefGoogle Scholar
  8. 8.
    Z. Paál, R. Schlögl, G. Ertl:J. Chem. Soc. Faraday Trans.,88, 1179 (1992).CrossRefGoogle Scholar
  9. 9.
    Z. Paál, R. Schlögl, G. Ertl:Catal. Lett.,12, 331 (1992).CrossRefGoogle Scholar
  10. 10.
    L. K. Verheij, M. B. Hugenschmidt:Surface Sci.,324, 185 (1995).CrossRefGoogle Scholar
  11. 11.
    C. H. Bartholomew in Hydrogen Effects in Catalysis: Fundamentals and Practical Applications (edited by Z. Paál and P.G. Menon). Marcel Dekker, New York 1988.Google Scholar
  12. 12.
    R. E. Gilbert, C. K. Mount, O. Melendez, G. B. Hoflund:J. Phys. Condens. Matter,5, A213 (1993).CrossRefGoogle Scholar
  13. 13.
    O. Melendez, G.B. Hoflund: unpublished data.Google Scholar
  14. 14.
    G. B. Hoflund, R. E. Gilbert, O. Melendez:React. Kinet. Catal. Lett.,52, 357 (1994).CrossRefGoogle Scholar
  15. 15.
    O. Melendez: Ph. D. Dissertation, University of Florida (1991).Google Scholar
  16. 16.
    K. Kawasaki, T. Kodama, H. Miki, J. Kioka:Surface Sci.,64, 349 (1977).CrossRefGoogle Scholar
  17. 17.
    S. L. Bernasek, K. Lenz, B. Poelsema, G. Comsa:Surface Sci.,183, L319 (1987).CrossRefGoogle Scholar
  18. 18.
    K. Lenz, B. Poelsema, S. L. Bernasek G. Comsa:Surface Sci.,189/190, 431 (1987).Google Scholar
  19. 19.
    J. L. Robbins, E. Marucchi-Soos:J. Phys. Chem.,93, 2885 (1989).CrossRefGoogle Scholar
  20. 20.
    R. L. Flessner, J. L. Falconer:J. Catal.,139, 421 (1993).CrossRefGoogle Scholar
  21. 21.
    J. Willsau, O. Wolter, J. Heitbaum:J. Electroanal. Chem.,185, 163 (1985).CrossRefGoogle Scholar
  22. 22.
    S. Wilhelm, T. Iwasita, W. Vielstich:J. Electroanal. Chem.,238, 383 (1987).CrossRefGoogle Scholar
  23. 23.
    S. Wilhelm, W. Vielstich H. W. Buschamann, T. Iwasita:J. Electroanal. Chem.,229, 377 (1987).CrossRefGoogle Scholar
  24. 24.
    T. Iwasita, E. Santos, W. Vielstich:J. Electroanal. Chem.,229, 367 (1987).CrossRefGoogle Scholar
  25. 25.
    V. S. Bagotzky, Yu. B. Vassiliev, O. A. Khazova:J. Electroanal. Chem.,81, 229 (1977).CrossRefGoogle Scholar
  26. 26.
    V. E. Kazarinov, G. Ya. Tysyachnaya, V. N. Andreev:J. Electroanal. Chem.,65, 391 (1975).CrossRefGoogle Scholar
  27. 27.
    V. E. Kazarinov, G. Ya. Tysyachnaya:Elektrokhimiya,7, 1552 (1971).Google Scholar
  28. 28.
    M. W. Breiter: inModern Aspects of Electrochemistry (edited by J. O' M. Bockris and B. E. Conway), Vol. 10, p. 178. Plenum Press, Princeton, NJ, 1975.Google Scholar
  29. 29.
    M. W. Breiter: inElectrochemical Processes in Fuel Cells. Springer Verlag, Berlin 1969.Google Scholar
  30. 30.
    Y. Nishiyama, H. Wise:J. Catal.,32, 50 (1974).CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • Gar B. Hoflund
    • 1
  • Charles K. Mount
    • 1
  • Richard E. Gilbert
    • 1
  1. 1.Department of Chemical EngineeringUniversity of FloridaGainesvilleUSA

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