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

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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.. (2007) Structural analysis of Pt(1 1 1)c(√3 × 5)rect.–CO using photoelectron diffraction. Surface Science, Vol.601 (No.5). pp. 1296-1303. ISSN 0039-6028

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Official URL: http://dx.doi.org/10.1016/j.susc.2006.12.073

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:

Journal Article

Subjects:

Q Science > QC Physics

Divisions:

Faculty of Science > Physics

Library of Congress Subject Headings (LCSH):

Surfaces (Physics) -- Research, Photoelectron spectroscopy, Carbon monoxide -- Research, Platinum compounds -- Research

Journal or Publication Title:

Surface Science

Publisher:

Elsevier BV

ISSN:

0039-6028

Official Date:

1 March 2007

Dates:

Date	Event
1 March 2007	Published

Volume:

Vol.601

Number:

No.5

Page Range:

pp. 1296-1303

Identification Number:

10.1016/j.susc.2006.12.073

Status:

Peer Reviewed

Access rights to Published version:

Open Access

Funder:

Engineering and Physical Sciences Research Council (EPSRC)

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