Surface structure and reactivity of Pd(100) during CO oxidation near ambient pressures
(2011) In Physical Chemistry Chemical Physics 13(29). p.13167-13171- Abstract
- The surface structure of Pd(100) during CO oxidation was measured using a combination of a flow reactor and in situ surface X-ray diffraction coupled to a large-area 2-dimensional detector. The surface structure was measured for P-O2/P-CO ratios between 0.6 and 10 at a fixed total gas pressure of 200 mbar and a fixed CO pressure of 10 +/- 1 mbar. In conjunction with the surface structure the reactivity of the surface was also determined. For all P-O2/P-CO ratios the surface was found to oxidize above a certain temperature. Three different types of oxides were observed: the (root 5 x root 5)R27 degrees surface oxide, an epitaxial layer of bulk-like PdO, and a non-epitaxial layer of bulk-like PdO. As soon as an oxide was present the... (More)
- The surface structure of Pd(100) during CO oxidation was measured using a combination of a flow reactor and in situ surface X-ray diffraction coupled to a large-area 2-dimensional detector. The surface structure was measured for P-O2/P-CO ratios between 0.6 and 10 at a fixed total gas pressure of 200 mbar and a fixed CO pressure of 10 +/- 1 mbar. In conjunction with the surface structure the reactivity of the surface was also determined. For all P-O2/P-CO ratios the surface was found to oxidize above a certain temperature. Three different types of oxides were observed: the (root 5 x root 5)R27 degrees surface oxide, an epitaxial layer of bulk-like PdO, and a non-epitaxial layer of bulk-like PdO. As soon as an oxide was present the reactivity of the surface was found to be mass transfer limited by the flux of CO molecules reaching the surface. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2088444
- author
- van Rijn, R. ; Balmes, O. ; Resta, A. ; Wermeille, D. ; Westerström, Rasmus LU ; Gustafson, Johan LU ; Felici, R. ; Lundgren, Edvin LU and Frenken, J. W. M.
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Chemistry Chemical Physics
- volume
- 13
- issue
- 29
- pages
- 13167 - 13171
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000292981600003
- scopus:79960356057
- pmid:21681289
- ISSN
- 1463-9084
- DOI
- 10.1039/c1cp20989b
- language
- English
- LU publication?
- yes
- id
- cb4bb31f-71ff-42de-ab7b-d27dccd58a39 (old id 2088444)
- date added to LUP
- 2016-04-01 13:10:00
- date last changed
- 2023-11-12 13:09:32
@article{cb4bb31f-71ff-42de-ab7b-d27dccd58a39, abstract = {{The surface structure of Pd(100) during CO oxidation was measured using a combination of a flow reactor and in situ surface X-ray diffraction coupled to a large-area 2-dimensional detector. The surface structure was measured for P-O2/P-CO ratios between 0.6 and 10 at a fixed total gas pressure of 200 mbar and a fixed CO pressure of 10 +/- 1 mbar. In conjunction with the surface structure the reactivity of the surface was also determined. For all P-O2/P-CO ratios the surface was found to oxidize above a certain temperature. Three different types of oxides were observed: the (root 5 x root 5)R27 degrees surface oxide, an epitaxial layer of bulk-like PdO, and a non-epitaxial layer of bulk-like PdO. As soon as an oxide was present the reactivity of the surface was found to be mass transfer limited by the flux of CO molecules reaching the surface.}}, author = {{van Rijn, R. and Balmes, O. and Resta, A. and Wermeille, D. and Westerström, Rasmus and Gustafson, Johan and Felici, R. and Lundgren, Edvin and Frenken, J. W. M.}}, issn = {{1463-9084}}, language = {{eng}}, number = {{29}}, pages = {{13167--13171}}, publisher = {{Royal Society of Chemistry}}, series = {{Physical Chemistry Chemical Physics}}, title = {{Surface structure and reactivity of Pd(100) during CO oxidation near ambient pressures}}, url = {{http://dx.doi.org/10.1039/c1cp20989b}}, doi = {{10.1039/c1cp20989b}}, volume = {{13}}, year = {{2011}}, }