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  Adsorption of NO on an oxygen precovered Ni(100) surface

Odörfer, G., Jaeger, R., Illing, G., Kuhlenbeck, H., & Freund, H.-J. (1990). Adsorption of NO on an oxygen precovered Ni(100) surface. Surface Science, 233(1-3), 44-58. doi:10.1016/0039-6028(90)90174-7.

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Odörfer, G., Author
Jaeger, R., Author
Illing, G., Author
Kuhlenbeck, H., Author
Freund, Hans-Joachim1, Author                 
Affiliations:
1Ruhr-Universität Bochum, Lehrstuhl für Physikalische Chemie 1, ou_persistent22              

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 Abstract: We have employed high resolution electron energy loss spectroscopy (HREELS), angle resolved photoelectron spectroscopy (ARUPS), and near edge X-ray absorption fine structure (NEXAFS) measurements to study the adsorption of nitric oxide (NO) on a clean and on oxygen precovered Ni(100) surfaces at T = 95 K. The adsorption behaviour on both the clean and the oxygen precovered surfaces is very complex. On the clean surface adsorption at low coverage starts in hollow sites with the NO axis oriented perpendicular to the surface. Consecutively, bridge sites are populated with both perpendicular and bent NO molecules. Finally, terminally bound, linear NO adsorbs on the surface. On the oxygen precovered surfaces we find the same adsorbate sites. Depending on whether we have chosen p(2×2) or c(2×2) oxygen precoverage we find a smaller percentage of molecules adsorbed in hollow sites, because oxygen occupies these sites in both layers but twice as many hollow sites in a c(2×2) layer. A particularly interesting observation concerns an oxygen influenced site in which the NO molecules are adsorbed with a bent orientation. This is corroborated via NEXAFS measurements. This NO species is more strongly bound to the surface than on the clean Ni surface. A section is included in the paper where we discuss some general aspects of NO bonding towards metal atoms in a linear versus bent orientation and the influence of coadsorbed species on the orientation of the molecular axis.

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Language(s): eng - English
 Dates: 1990-01-241990-02-161990-07-01
 Publication Status: Issued
 Pages: 15
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/0039-6028(90)90174-7
 Degree: -

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Title: Surface Science
  Abbreviation : Surf. Sci.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 15 Volume / Issue: 233 (1-3) Sequence Number: - Start / End Page: 44 - 58 Identifier: ISSN: 0039-6028
CoNE: https://pure.mpg.de/cone/journals/resource/0039-6028