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

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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.

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Authors and Affiliations

  1. Physikalisches Institut, Rheinisch-Westfälische Technische Hochschule, D-5100, Aachen, Fed. Rep. Germany

    H. -J. Krebs & H. Lüth

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  1. H. -J. Krebs
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  2. H. Lüth
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Krebs, H.J., Lüth, H. Evidence for two different adsorption sites of CO on Pt(111) from infrared reflection spectroscopy. Appl. Phys. 14, 337–342 (1977). https://doi.org/10.1007/BF00883436

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  • DOI: https://doi.org/10.1007/BF00883436

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