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Surface structure and reactivity of Pd(100) during CO oxidation near ambient pressures

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. (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)
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author
organization
publishing date
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
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
2011-08-25 15:09:23
date last changed
2017-11-12 03:35:33
@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},
  volume       = {13},
  year         = {2011},
}