Adsorption sites in coadsorption systems determined by photoemission spectroscopy : K and CO coadsorbed on Rh(111)
(1998) In Surface Science 410(2-3). p.330-343- Abstract
The adsorption sites of coadsorbed K and CO on the Rh(111) surface have been determined using high-resolution core-level spectroscopy, low-energy electron diffraction and site-resolved photoelectron diffraction. For both a (2 × 2)-2CO-1K and a (2√3 × 2√3)-6CO-1K structure, we find that the CO molecules occupy threefold hollow sites and the K atoms on-top sites, contrary to the adsorption sites of K (threefold hollow site) and CO (on-top site below 0.5 monolayers) if adsorbed alone on Rh(111). Deposition of K onto a CO precovered surface is found to induce large shifts towards lower binding energy of the C and O 1s core levels (∼0.7 eV for C 1s and ∼1.5 eV for O 1s). The major part of these shifts is shown to arise from the K-induced... (More)
The adsorption sites of coadsorbed K and CO on the Rh(111) surface have been determined using high-resolution core-level spectroscopy, low-energy electron diffraction and site-resolved photoelectron diffraction. For both a (2 × 2)-2CO-1K and a (2√3 × 2√3)-6CO-1K structure, we find that the CO molecules occupy threefold hollow sites and the K atoms on-top sites, contrary to the adsorption sites of K (threefold hollow site) and CO (on-top site below 0.5 monolayers) if adsorbed alone on Rh(111). Deposition of K onto a CO precovered surface is found to induce large shifts towards lower binding energy of the C and O 1s core levels (∼0.7 eV for C 1s and ∼1.5 eV for O 1s). The major part of these shifts is shown to arise from the K-induced site change of the CO molecules. This finding may be of importance in the interpretation of XPS data of related co-adsorption systems. Finally, it is suggested that the C and O 1s binding energies provide useful fingerprints of the CO adsorption site also for co-adsorption systems.
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- author
- Strisland, F. ; Beutler, A. LU ; Jaworowski, A. J. LU ; Nyholm, R. LU ; Setlik, B. ; Heskett, D. and Andersen, J. N. LU
- organization
- publishing date
- 1998-08-01
- type
- Contribution to journal
- publication status
- published
- keywords
- Co-adsorption, High-resolution core-level photoemission, Photoelectron diffraction
- in
- Surface Science
- volume
- 410
- issue
- 2-3
- pages
- 14 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:0032140728
- ISSN
- 0039-6028
- language
- English
- LU publication?
- yes
- id
- c62b2acc-a965-46d0-bfec-f542a35c4172
- date added to LUP
- 2016-04-27 16:47:02
- date last changed
- 2022-01-30 02:55:12
@article{c62b2acc-a965-46d0-bfec-f542a35c4172, abstract = {{<p>The adsorption sites of coadsorbed K and CO on the Rh(111) surface have been determined using high-resolution core-level spectroscopy, low-energy electron diffraction and site-resolved photoelectron diffraction. For both a (2 × 2)-2CO-1K and a (2√3 × 2√3)-6CO-1K structure, we find that the CO molecules occupy threefold hollow sites and the K atoms on-top sites, contrary to the adsorption sites of K (threefold hollow site) and CO (on-top site below 0.5 monolayers) if adsorbed alone on Rh(111). Deposition of K onto a CO precovered surface is found to induce large shifts towards lower binding energy of the C and O 1s core levels (∼0.7 eV for C 1s and ∼1.5 eV for O 1s). The major part of these shifts is shown to arise from the K-induced site change of the CO molecules. This finding may be of importance in the interpretation of XPS data of related co-adsorption systems. Finally, it is suggested that the C and O 1s binding energies provide useful fingerprints of the CO adsorption site also for co-adsorption systems.</p>}}, author = {{Strisland, F. and Beutler, A. and Jaworowski, A. J. and Nyholm, R. and Setlik, B. and Heskett, D. and Andersen, J. N.}}, issn = {{0039-6028}}, keywords = {{Co-adsorption; High-resolution core-level photoemission; Photoelectron diffraction}}, language = {{eng}}, month = {{08}}, number = {{2-3}}, pages = {{330--343}}, publisher = {{Elsevier}}, series = {{Surface Science}}, title = {{Adsorption sites in coadsorption systems determined by photoemission spectroscopy : K and CO coadsorbed on Rh(111)}}, volume = {{410}}, year = {{1998}}, }