Identification of a laterally mobile state during CO adsorption
(2000) In Journal of Physics: Condensed Matter 12(6). p.765-772- Abstract
We have investigated CO adsorption at 300 K on ∼ 1.5 atomic layer thick Pd films on a Mo(110) surface by high-resolution core level photoemission. We describe how high-resolution core level spectroscopy may be utilized to study the influence of laterally mobile states on the sticking probability of molecules on such a laterally heterogeneous surface. The present Pd films are laterally heterogeneous in the sense that the additional ∼ 0.5 atomic Pd layer forms mesoscopic one-layer thick islands on top of the first Pd layer. At 300 K, CO chemisorbs on these two-layer thick islands but not on the one-layer parts of the film. The rate at which these two-layer islands are filled by CO molecules as the surface is exposed to CO is found to be... (More)
We have investigated CO adsorption at 300 K on ∼ 1.5 atomic layer thick Pd films on a Mo(110) surface by high-resolution core level photoemission. We describe how high-resolution core level spectroscopy may be utilized to study the influence of laterally mobile states on the sticking probability of molecules on such a laterally heterogeneous surface. The present Pd films are laterally heterogeneous in the sense that the additional ∼ 0.5 atomic Pd layer forms mesoscopic one-layer thick islands on top of the first Pd layer. At 300 K, CO chemisorbs on these two-layer thick islands but not on the one-layer parts of the film. The rate at which these two-layer islands are filled by CO molecules as the surface is exposed to CO is found to be consistent with a picture where CO molecules that initially impinge on the one-layer parts of the surface enter a laterally mobile state and diffuse to the two-layer islands and adsorb there. This mobile state is in many respects similar to a classical precursor state.
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- author
- Beutler, A. LU ; Jaworowski, A. J. LU ; Wiklund, M. LU ; Sandell, A. LU ; Nyholm, R. LU ; Gray, S. LU and Andersen, J. N. LU
- organization
- publishing date
- 2000-02-14
- type
- Contribution to journal
- publication status
- published
- in
- Journal of Physics: Condensed Matter
- volume
- 12
- issue
- 6
- pages
- 8 pages
- publisher
- IOP Publishing
- external identifiers
-
- scopus:0005157290
- ISSN
- 0953-8984
- DOI
- 10.1088/0953-8984/12/6/301
- language
- English
- LU publication?
- yes
- id
- 9e464859-5648-46c3-aeeb-b2403d2cde48
- date added to LUP
- 2016-04-27 16:43:16
- date last changed
- 2022-03-01 00:57:15
@article{9e464859-5648-46c3-aeeb-b2403d2cde48, abstract = {{<p>We have investigated CO adsorption at 300 K on ∼ 1.5 atomic layer thick Pd films on a Mo(110) surface by high-resolution core level photoemission. We describe how high-resolution core level spectroscopy may be utilized to study the influence of laterally mobile states on the sticking probability of molecules on such a laterally heterogeneous surface. The present Pd films are laterally heterogeneous in the sense that the additional ∼ 0.5 atomic Pd layer forms mesoscopic one-layer thick islands on top of the first Pd layer. At 300 K, CO chemisorbs on these two-layer thick islands but not on the one-layer parts of the film. The rate at which these two-layer islands are filled by CO molecules as the surface is exposed to CO is found to be consistent with a picture where CO molecules that initially impinge on the one-layer parts of the surface enter a laterally mobile state and diffuse to the two-layer islands and adsorb there. This mobile state is in many respects similar to a classical precursor state.</p>}}, author = {{Beutler, A. and Jaworowski, A. J. and Wiklund, M. and Sandell, A. and Nyholm, R. and Gray, S. and Andersen, J. N.}}, issn = {{0953-8984}}, language = {{eng}}, month = {{02}}, number = {{6}}, pages = {{765--772}}, publisher = {{IOP Publishing}}, series = {{Journal of Physics: Condensed Matter}}, title = {{Identification of a laterally mobile state during CO adsorption}}, url = {{http://dx.doi.org/10.1088/0953-8984/12/6/301}}, doi = {{10.1088/0953-8984/12/6/301}}, volume = {{12}}, year = {{2000}}, }