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The surface oxide as a source of oxygen on Rh(111)
Maxlab.ORCID iD: 0000-0003-1631-4293
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2005 (English)In: Journal of Electron Spectroscopy and Related Phenomena, ISSN 0368-2048, E-ISSN 1873-2526, Vol. 144, no SI, 367-372 p.Article in journal (Refereed) Published
Abstract [en]

The reduction of a thin surface oxide on the Rh(1 1 1) surface by CO is studied in situ by photoemission spectroscopy, scanning tunneling microscopy, and density functional theory. CO molecules are found not to adsorb on the surface oxide at a sample temperature of 100 K, in contrast to on the clean and chemisorbed oxygen covered surface. Despite this behavior, the surface oxide may still be reduced by CO, albeit in a significantly different fashion as compared to the reduction of a phase containing only chemisorbed on surface oxygen. The experimental observations combined with theoretical considerations concerning the stability of the surface oxide, result in a model of the reduction process at these pressures suggesting that the surface oxide behaves as a source of oxygen for the CO-oxidation reaction.

Place, publisher, year, edition, pages
2005. Vol. 144, no SI, 367-372 p.
Keyword [en]
PES, DFR, STM, Rh, O, CO
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URN: urn:nbn:se:kth:diva-49037DOI: 10.1016/j.elspec.2005.01.004ISI: 000229657100088OAI: oai:DiVA.org:kth-49037DiVA: diva2:459134
Note
QC 20111128 14th International Conference on Vacuum Ultraviolet Radiation Physics, Cairns, AUSTRALIA, JUL 19-23, 2004Available from: 2011-11-24 Created: 2011-11-24 Last updated: 2017-12-08Bibliographically approved

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Weissenrieder, Jonas

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