Catalysis Letters

, Volume 42, Issue 3–4, pp 167–172 | Cite as

Electronic, chemisorption and catalytic properties of Pd overlayers on Ru(100) probed by CO and O2 adsorption and reaction

  • S. Poulston
  • M. Tikhov
  • R. M. Lambert


We have employed UHV surface sensitive techniques together with CO and oxygen adsorption and reaction to link the chemical, electronic and structural properties of ultra-thin Pd films vapour-deposited on Ru(100). At low Pd coverage the properties of the Pd overlayer are considerably modified relative to the bulk-like properties exhibited by thick Pd films. A Pd coverage of 6 ML seems to mark a critical transition to bulk-like Pd behaviour. The strongest modifications in the Pd overlayer occur for coverages up to 2 ML and are exemplified by a reduction in the CO desorption temperature, a low DOS at Fermi level,Ef, and a lower activity toward CO oxidation.


oxygen Ru(100) palladium CO oxidation 


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  1. [1]
    J.H. Sinfelt,Bimetallic Catalysts (Wiley, New York, 1983).Google Scholar
  2. [2]
    J.A. Rodriguez and D.W. Goodman, J. Phys. Chem. 95 (1991) 4196.Google Scholar
  3. [3]
    J.A. Rodriguez, R.A. Campbell and D.W. Goodman, J. Phys. Chem. 95 (1991) 5716.Google Scholar
  4. [4]
    P. Hermann, B. Tardy, Y. Jugnet and J.-C. Bertolini, Catal. Lett. 36 (1996) 9.Google Scholar
  5. [5]
    C. Park, Surf. Sci. 203 (1988) 395.Google Scholar
  6. [6]
    S. Poulston, M. Tikhov and R.M. Lambert, Surf. Sci. 352-354 (1996) 41.Google Scholar
  7. [7]
    R.G. Musket, W. McClean, C.A. Colmenares, D.M. Makowiecki and W.J. Siekhaus, Appl. Surf. Sci. 10 (1982) 143.Google Scholar
  8. [8]
    J.N. Andersen, M. Qvarford, R. Nyholm, S.L. Sorensen and C. Wigren, Phys. Rev. Lett. 67 (1991) 2822.Google Scholar
  9. [9]
    S.-L. Weng and M. El-Batanouny, Phys. Rev. Lett. 44 (1980) 612.Google Scholar
  10. [10]
    M. El-Batanouny, D.R. Hamann, S.R. Chubb and J.W. Davenport, Phys. Rev. B 27 (1983) 2575.Google Scholar
  11. [11]
    J.E. Demuth, Surf. Sci. 65 (1977) 369.Google Scholar
  12. [12]
    M.W. Ruckman, V. Murgai and M. Strongin, Phys. Rev. B 34 (1986) 6759.Google Scholar
  13. [13]
    G.K. Wertheim and J.E. Rowe, Science 260 (1993) 1527Google Scholar
  14. [13]a
    J.A. Rodriguez and D.W. Goodman, Science 260 (1993) 1527.Google Scholar
  15. [14]
    J.-W. He, U. Memmert and P.R. Norton, J. Chem. Phys. 90 (1989) 5088.Google Scholar
  16. [15]
    S. Poulston, M. Tikhov and R.M. Lambert, Surf. Rev. Lett. 1 (1994) 655.Google Scholar
  17. [16]
    A. Ortega, F.M. Hoffman and A.M. Bradshaw, Surf. Sci. 119 (1982) 79Google Scholar
  18. [16]a
    M.P. Kiskinova and G.M. Bliznakov, Surf. Sci. 123 (1982) 61.Google Scholar
  19. [17]
    G. Blyholder, J. Phys. Chem. 79 (1975) 756.Google Scholar
  20. [18](a)
    T. Engel and G. Ertl, J. Chem. Phys. 69 (1978) 1267Google Scholar
  21. [18](b)
    T. Engel and G. Ertl, in:The Chemical Physics of Solid Surfaces and Heterogeneous Catalysts, Vol. 4, eds. D.A. Kink and D.P. Woodruff (Elsevier, Amsterdam, 1982).Google Scholar
  22. [19]
    P.J. Berlowitz, C.H.F. Peden and D.W. Goodman, J. Phys. Chem. 92 (1988) 5213.Google Scholar
  23. [20]
    M. Ehsasi, C. Seidel, H. Ruppender, W. Drachsel, J.H. Block and K. Christmann, Surf. Sci. 210 (1989) L198.Google Scholar

Copyright information

© J.C. Baltzer AG, Science Publishers 1996

Authors and Affiliations

  • S. Poulston
    • 1
  • M. Tikhov
    • 1
  • R. M. Lambert
    • 1
  1. 1.Department of ChemistryUniversity of CambridgeCambridgeUK

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