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One-dimensional PtO2 at Pt steps: Formation and reaction with CO

Wang, JG; Li, WX; Borg, Mikael LU ; Gustafson, Johan LU ; Mikkelsen, Anders LU ; Pedersen, TM; Lundgren, Edvin LU ; Weissenrieder, Jonas LU ; Klikovits, J and Schmid, M, et al. (2005) In Physical Review Letters 95(25).
Abstract
Using core-level spectroscopy and density functional theory we show that a one-dimensional (1D) PtO2 oxide structure forms at the steps of the Pt(332) surface after O-2 exposure. The 1D oxide is found to be stable in an oxygen pressure range, where bulk oxides are only metastable, and is therefore argued to be a precursor to the Pt oxidation. As an example of the consequences of such a precursor exclusively present at the steps, we investigate the reaction of CO with oxygen covered Pt(332). Albeit more strongly bound, the oxidic oxygen is found to react more easily with CO than oxygen chemisorbed on the Pt terraces.
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publication status
published
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Physical Review Letters
volume
95
issue
25
publisher
American Physical Society
external identifiers
  • wos:000234118500042
  • scopus:29144441204
ISSN
1079-7114
DOI
10.1103/PhysRevLett.95.256102
language
English
LU publication?
yes
id
599cd370-2a40-4db5-b2d2-3d8aec9ea9a4 (old id 210441)
date added to LUP
2007-08-21 09:42:53
date last changed
2017-10-22 03:52:55
@article{599cd370-2a40-4db5-b2d2-3d8aec9ea9a4,
  abstract     = {Using core-level spectroscopy and density functional theory we show that a one-dimensional (1D) PtO2 oxide structure forms at the steps of the Pt(332) surface after O-2 exposure. The 1D oxide is found to be stable in an oxygen pressure range, where bulk oxides are only metastable, and is therefore argued to be a precursor to the Pt oxidation. As an example of the consequences of such a precursor exclusively present at the steps, we investigate the reaction of CO with oxygen covered Pt(332). Albeit more strongly bound, the oxidic oxygen is found to react more easily with CO than oxygen chemisorbed on the Pt terraces.},
  articleno    = {146102},
  author       = {Wang, JG and Li, WX and Borg, Mikael and Gustafson, Johan and Mikkelsen, Anders and Pedersen, TM and Lundgren, Edvin and Weissenrieder, Jonas and Klikovits, J and Schmid, M and Hammer, B and Andersen, Jesper N},
  issn         = {1079-7114},
  language     = {eng},
  number       = {25},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {One-dimensional PtO2 at Pt steps: Formation and reaction with CO},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.95.256102},
  volume       = {95},
  year         = {2005},
}