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Kinetic hindrance during the initial oxidation of Pd(100) at ambient pressures

Lundgren, Edvin LU ; Gustafson, Johan LU ; Mikkelsen, Anders LU ; Andersen, Jesper N LU ; Stierle, A; Dosch, H; Todorova, M; Rogal, J; Reuter, K and Scheffler, M (2004) In Physical Review Letters 92(4).
Abstract
The oxidation of the Pd(100) surface at oxygen pressures in the 10(-6) to 10(3) mbar range and temperatures up to 1000 K has been studied in situ by surface x-ray diffraction (SXRD). The results provide direct structural information on the phases present in the surface region and on the kinetics of the oxide formation. Depending on the (T,p) environmental conditions, we observe either a thin (root5 x root5)R27degrees surface oxide or the growth of a rough, poorly ordered bulk oxide film of PdO predominantly with (001) orientation. By either comparison to the surface phase diagram from first-principles atomistic thermodynamics or by explicit time-resolved measurements we identify a strong kinetic hindrance to the bulk oxide formation even... (More)
The oxidation of the Pd(100) surface at oxygen pressures in the 10(-6) to 10(3) mbar range and temperatures up to 1000 K has been studied in situ by surface x-ray diffraction (SXRD). The results provide direct structural information on the phases present in the surface region and on the kinetics of the oxide formation. Depending on the (T,p) environmental conditions, we observe either a thin (root5 x root5)R27degrees surface oxide or the growth of a rough, poorly ordered bulk oxide film of PdO predominantly with (001) orientation. By either comparison to the surface phase diagram from first-principles atomistic thermodynamics or by explicit time-resolved measurements we identify a strong kinetic hindrance to the bulk oxide formation even at temperatures as high as 675 K. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
92
issue
4
publisher
American Physical Society
external identifiers
  • wos:000188747600035
  • scopus:7044232265
ISSN
1079-7114
DOI
10.1103/PhysRevLett.92.046101
language
English
LU publication?
yes
id
2e0ff66c-1c1a-4aa9-b529-9698bfb88c18 (old id 288554)
date added to LUP
2007-10-24 21:13:40
date last changed
2017-11-12 03:18:57
@article{2e0ff66c-1c1a-4aa9-b529-9698bfb88c18,
  abstract     = {The oxidation of the Pd(100) surface at oxygen pressures in the 10(-6) to 10(3) mbar range and temperatures up to 1000 K has been studied in situ by surface x-ray diffraction (SXRD). The results provide direct structural information on the phases present in the surface region and on the kinetics of the oxide formation. Depending on the (T,p) environmental conditions, we observe either a thin (root5 x root5)R27degrees surface oxide or the growth of a rough, poorly ordered bulk oxide film of PdO predominantly with (001) orientation. By either comparison to the surface phase diagram from first-principles atomistic thermodynamics or by explicit time-resolved measurements we identify a strong kinetic hindrance to the bulk oxide formation even at temperatures as high as 675 K.},
  articleno    = {046101},
  author       = {Lundgren, Edvin and Gustafson, Johan and Mikkelsen, Anders and Andersen, Jesper N and Stierle, A and Dosch, H and Todorova, M and Rogal, J and Reuter, K and Scheffler, M},
  issn         = {1079-7114},
  language     = {eng},
  number       = {4},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Kinetic hindrance during the initial oxidation of Pd(100) at ambient pressures},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.92.046101},
  volume       = {92},
  year         = {2004},
}