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Carbon monoxide oxidation on copper oxide thin films supported on corrugated cerium dioxide {111} and {001} surfaces

Skårman, Björn LU ; Wallenberg, Reine LU ; Larsson, PO; Andersson, Arne LU ; Bovin, JO; Jacobsen, SN and Helmersson, U (1999) In Journal of Catalysis 181(1). p.6-15
Abstract
Thin films of CeO2 with and without a thin layer of copper oxide were prepared by rf magnetron sputtering on surfaces of alpha-Al2O3 (sapphire) substrates. Careful characterisation of the surfaces was performed down to the atomic level using high-resolution electron-microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. Surprisingly, the as-deposited, corrugated ceria surfaces, nominally (001), consist exclusively of {111}-type lattice planes, but, upon annealing at 800 degrees C, a well-defined portion of (001) surfaces are formed. Oxidation of carbon monoxide to carbon dioxide was studied, having the prepared films in a stirred batch reactor. A batch reactor was chosen so that the conversion over the small sample... (More)
Thin films of CeO2 with and without a thin layer of copper oxide were prepared by rf magnetron sputtering on surfaces of alpha-Al2O3 (sapphire) substrates. Careful characterisation of the surfaces was performed down to the atomic level using high-resolution electron-microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. Surprisingly, the as-deposited, corrugated ceria surfaces, nominally (001), consist exclusively of {111}-type lattice planes, but, upon annealing at 800 degrees C, a well-defined portion of (001) surfaces are formed. Oxidation of carbon monoxide to carbon dioxide was studied, having the prepared films in a stirred batch reactor. A batch reactor was chosen so that the conversion over the small sample surface area (ca 10(-4) m(2)) could be monitored as a function of the reaction time. The activity of copper oxide on annealed ceria surfaces is markedly higher than on nonannealed surfaces, indicating a favourable synergetic effect between the ceria (001) surface and the copper oxide phase. (C) 1999 Academic Press. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
in
Journal of Catalysis
volume
181
issue
1
pages
6 - 15
publisher
Elsevier
external identifiers
  • wos:000077835800002
  • scopus:0002418899
ISSN
1090-2694
DOI
10.1006/jcat.1998.2278
language
English
LU publication?
yes
id
3859ca51-acc9-425a-9142-af5a9b0fb005 (old id 3915213)
date added to LUP
2013-07-02 08:26:25
date last changed
2017-01-01 04:31:03
@article{3859ca51-acc9-425a-9142-af5a9b0fb005,
  abstract     = {Thin films of CeO2 with and without a thin layer of copper oxide were prepared by rf magnetron sputtering on surfaces of alpha-Al2O3 (sapphire) substrates. Careful characterisation of the surfaces was performed down to the atomic level using high-resolution electron-microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. Surprisingly, the as-deposited, corrugated ceria surfaces, nominally (001), consist exclusively of {111}-type lattice planes, but, upon annealing at 800 degrees C, a well-defined portion of (001) surfaces are formed. Oxidation of carbon monoxide to carbon dioxide was studied, having the prepared films in a stirred batch reactor. A batch reactor was chosen so that the conversion over the small sample surface area (ca 10(-4) m(2)) could be monitored as a function of the reaction time. The activity of copper oxide on annealed ceria surfaces is markedly higher than on nonannealed surfaces, indicating a favourable synergetic effect between the ceria (001) surface and the copper oxide phase. (C) 1999 Academic Press.},
  author       = {Skårman, Björn and Wallenberg, Reine and Larsson, PO and Andersson, Arne and Bovin, JO and Jacobsen, SN and Helmersson, U},
  issn         = {1090-2694},
  language     = {eng},
  number       = {1},
  pages        = {6--15},
  publisher    = {Elsevier},
  series       = {Journal of Catalysis},
  title        = {Carbon monoxide oxidation on copper oxide thin films supported on corrugated cerium dioxide {111} and {001} surfaces},
  url          = {http://dx.doi.org/10.1006/jcat.1998.2278},
  volume       = {181},
  year         = {1999},
}