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Structural analysis of Pt(1 1 1)c(√3 × 5)rect.–CO using photoelectron diffraction

Nisbet, G., Lamont, C.L.A., Polcik, M., Terborg, R., Sayago, D. I., Hoeft, J.T., Kittel, M., Toomes, R. L. and Woodruff, D.P. (2006) Structural analysis of Pt(1 1 1)c(√3 × 5)rect.–CO using photoelectron diffraction. Surface science, 601 (5). pp. 1296-1303. ISSN 0039-6028

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    Abstract

    Core level shift scanned-energy mode photoelectron diffraction using the two distinct components of the C 1s emission has been used to determine the structure of the Pt(1 1 1)c(√3 × 5)rect.–CO phase formed by 0.6 ML of adsorbed CO. The results confirm earlier assignments of these components to CO in atop and bridging sites, further confirm that the best structural model involves a 2:1 occupation ratio of these two sites, and provides quantitative structural parameter values. In particular the Pt–C chemisorption bondlengths for the atop and bridging sites are, respectively, 1.86 ± 0.02 Å and 2.02 ± 0.04 Å. These values are closely similar to those found in the 0.5 ML coverage c(4 × 2) phase, involving an atop:bridge occupation ratio of 1:1, obtained in earlier quantitative low energy electron diffraction studies. The results also indicate a clear tilt of the molecular axis of atop CO species in this compression phase, consistent with the finding of an earlier electron-stimulated desorption ion angular distribution investigation

    Item Type: Article
    Additional Information: Copyright © 2006 Elsevier B.V. All rights reserved.
    Subjects: Q Science > QD Chemistry
    Schools: School of Applied Sciences
    School of Applied Sciences > Materials and Catalysis Research Centre
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    Depositing User: Users 4 not found.
    Date Deposited: 10 Oct 2007
    Last Modified: 12 Jan 2011 12:31
    URI: http://eprints.hud.ac.uk/id/eprint/427

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