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
Article

Abstract

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.

Keywords

oxygen Ru(100) palladium CO oxidation 

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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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