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Applied physics

, Volume 14, Issue 4, pp 337–342 | Cite as

Evidence for two different adsorption sites of CO on Pt(111) from infrared reflection spectroscopy

  • H. -J. Krebs
  • H. Lüth
Contributed Papers

Abstract

The adsorption of CO on Pt(111) surfaces has been studied under clean conditions by a highly surface sensitive double-beam infrared reflection spectroscopy (IRS). In contrast to results of other authors two stretching vibrations of adsorbed CO rather than one are detected near 2100cm−1 and 1870cm−1. This is in agreement with recent findings in high-resolution electron energy loss spectroscopy (ELS). The results are discussed in terms of two adsorption sites: CO adsorbed in on-top positions and double coordinated on bridging sites, respectively. Furthermore, a precursor state and a preferential adsorption in islands at low coverage is taken into account.

PACS Code

68.30. +Z 

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Copyright information

© Springer-Verlag 1977

Authors and Affiliations

  • H. -J. Krebs
    • 1
  • H. Lüth
    • 1
  1. 1.Physikalisches InstitutRheinisch-Westfälische Technische HochschuleAachenFed. Rep. Germany

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