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Vibrationally resolved C Is photoemission from CO absorbed on Rh(1 1 1) : The investigation of a new chemically shifted C Is component

Smedh, M. LU ; Beutler, A. LU ; Ramsvik, T.; Nyholm, R. LU ; Borg, M; Andersen, J. N. LU ; Duschek, R.; Sock, M.; Netzer, F. P. and Ramsey, M. G. (2001) In Surface Science 491(1-2). p.99-114
Abstract

High-resolution core-level photoemission at an energy resolution better than the intrinsic width of the C 1s level has been used to study the CO/Rh(1 1 1) overlayer system. C Is spectra have been measured in a large CO coverage range; from low coverages, where the CO molecules only adsorb in on-top positions, to saturation coverage, where CO molecules occupy both on-top and threefold hollow sites. Fine structure components due to vibrational excitation of the C-O stretch mode are clearly resolved in the emission peak from each site. The vibrational splittings and intensity ratios are found to be different for the different adsorption sites. A third C Is component, which has not been resolved earlier, is found at intermediate CO... (More)

High-resolution core-level photoemission at an energy resolution better than the intrinsic width of the C 1s level has been used to study the CO/Rh(1 1 1) overlayer system. C Is spectra have been measured in a large CO coverage range; from low coverages, where the CO molecules only adsorb in on-top positions, to saturation coverage, where CO molecules occupy both on-top and threefold hollow sites. Fine structure components due to vibrational excitation of the C-O stretch mode are clearly resolved in the emission peak from each site. The vibrational splittings and intensity ratios are found to be different for the different adsorption sites. A third C Is component, which has not been resolved earlier, is found at intermediate CO coverages. Some possible explanations for the origin of this extra component are discussed. In the light of its binding energy and vibrational energy in photoemission, together with supporting evidence from highresolution electron energy loss spectroscopy data and photoelectron diffraction, this is assigned to bridging CO species at intermediate coverages. © 2001 Elsevier Science B.V. All rights reserved.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Carbon monoxide, Chemisorption, Electron energy loss spectroscopy (EELS), Low index single crystal surfaces, Rhodium, Synchrotron radiation photoelectron spectroscopy, Vibrations of adsorbed molecules
in
Surface Science
volume
491
issue
1-2
pages
16 pages
publisher
Elsevier
external identifiers
  • scopus:0001770349
ISSN
0039-6028
DOI
10.1016/S0039-6028(01)01357-7
language
English
LU publication?
yes
id
6621b5f2-af5d-43ad-ad7a-6f2ae67c99c8
date added to LUP
2016-04-27 16:40:14
date last changed
2017-02-26 04:37:54
@article{6621b5f2-af5d-43ad-ad7a-6f2ae67c99c8,
  abstract     = {<p>High-resolution core-level photoemission at an energy resolution better than the intrinsic width of the C 1s level has been used to study the CO/Rh(1 1 1) overlayer system. C Is spectra have been measured in a large CO coverage range; from low coverages, where the CO molecules only adsorb in on-top positions, to saturation coverage, where CO molecules occupy both on-top and threefold hollow sites. Fine structure components due to vibrational excitation of the C-O stretch mode are clearly resolved in the emission peak from each site. The vibrational splittings and intensity ratios are found to be different for the different adsorption sites. A third C Is component, which has not been resolved earlier, is found at intermediate CO coverages. Some possible explanations for the origin of this extra component are discussed. In the light of its binding energy and vibrational energy in photoemission, together with supporting evidence from highresolution electron energy loss spectroscopy data and photoelectron diffraction, this is assigned to bridging CO species at intermediate coverages. © 2001 Elsevier Science B.V. All rights reserved.</p>},
  author       = {Smedh, M. and Beutler, A. and Ramsvik, T. and Nyholm, R. and Borg, M and Andersen, J. N. and Duschek, R. and Sock, M. and Netzer, F. P. and Ramsey, M. G.},
  issn         = {0039-6028},
  keyword      = {Carbon monoxide,Chemisorption,Electron energy loss spectroscopy (EELS),Low index single crystal surfaces,Rhodium,Synchrotron radiation photoelectron spectroscopy,Vibrations of adsorbed molecules},
  language     = {eng},
  number       = {1-2},
  pages        = {99--114},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {Vibrationally resolved C Is photoemission from CO absorbed on Rh(1 1 1) : The investigation of a new chemically shifted C Is component},
  url          = {http://dx.doi.org/10.1016/S0039-6028(01)01357-7},
  volume       = {491},
  year         = {2001},
}