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Hydrogen adsorption on the Pt(111)(root 3x root 5)R30 degrees-Sn surface alloy studied by high resolution core level photoelectron spectroscopy
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1996 (English)In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 99, no 4, 371-378 p.Article in journal (Refereed) Published
Abstract [en]

Investigation of the clean and atomic hydrogen covered Pt(111)(root 3 x root 3)R30 degrees-Sn surface alloy has been carried out using high resolution core level photoelectron spectroscopy, The Pt 4(7/2) spectrum recorded from the clean surface alloy shows a single surface peak shifted - 0.25 eV relative to the bulk. Its interpretation by means of a thermodynamical model using Born-Haber cycles confirms the surface alloy model. Adsorption of H does not change the line shape of the Sn 4d core level while a new surface component shifted by 0.59 eV compared to the bulk peak appears in the Pt 4(7/2) spectrum. These results are discussed in the light of the thermodynamical calculations, H atoms are believed to bind only to Pt atoms, and their adsorption site seems to be influenced by the tin present in the surface layer.

Place, publisher, year, edition, pages
1996. Vol. 99, no 4, 371-378 p.
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Natural Sciences
URN: urn:nbn:se:kth:diva-84424DOI: 10.1016/0169-4332(96)00452-7ISI: A1996VD97500014OAI: diva2:499320
NR 20140805Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2012-02-13Bibliographically approved

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