Ru(0001) model catalyst under oxidizing and reducing reaction conditions: in-situ high-pressure surface X-ray diffraction study
(2005) In The Journal of Physical Chemistry Part B 109(46). p.21825-21830- Abstract
- With surface X-ray diffraction (SXRD) using a high-pressure reaction chamber we investigated in-situ the oxidation of the Ru(0001) model catalyst under various reaction conditions, starting from a strongly oxidizing environment to reaction conditions typical for CO oxidation. With a mixture Of O-2 and CO (stoichiometry, 2:1) the partial pressure of oxygen has to be increased to 20 mbar to form the catalytically active RuO2(110) oxide film, while in pure oxygen environment a pressure of 10(-5) mbar is already sufficient to oxidize the Ru(0001) surface. For preparation temperatures in the range of 550-630 K a self-limiting RUO2(110) film is produced with a thickness of 1.6 nm. The RuO2(110) film grows self-acceleratedly after an induction... (More)
- With surface X-ray diffraction (SXRD) using a high-pressure reaction chamber we investigated in-situ the oxidation of the Ru(0001) model catalyst under various reaction conditions, starting from a strongly oxidizing environment to reaction conditions typical for CO oxidation. With a mixture Of O-2 and CO (stoichiometry, 2:1) the partial pressure of oxygen has to be increased to 20 mbar to form the catalytically active RuO2(110) oxide film, while in pure oxygen environment a pressure of 10(-5) mbar is already sufficient to oxidize the Ru(0001) surface. For preparation temperatures in the range of 550-630 K a self-limiting RUO2(110) film is produced with a thickness of 1.6 nm. The RuO2(110) film grows self-acceleratedly after an induction period. The RuO2 films on Ru(0001) can readily be reduced by H-2 and CO exposures at 415 K, without an induction period. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/212096
- author
- He, YB ; Knapp, M ; Lundgren, Edvin LU and Over, H
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Part B
- volume
- 109
- issue
- 46
- pages
- 21825 - 21830
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000233437100051
- scopus:28944442275
- ISSN
- 1520-5207
- DOI
- 10.1021/jp0538520
- language
- English
- LU publication?
- yes
- id
- 087153dc-dc5e-4a36-a02a-b2f211a2f827 (old id 212096)
- date added to LUP
- 2016-04-01 16:26:03
- date last changed
- 2022-03-22 18:42:59
@article{087153dc-dc5e-4a36-a02a-b2f211a2f827,
abstract = {{With surface X-ray diffraction (SXRD) using a high-pressure reaction chamber we investigated in-situ the oxidation of the Ru(0001) model catalyst under various reaction conditions, starting from a strongly oxidizing environment to reaction conditions typical for CO oxidation. With a mixture Of O-2 and CO (stoichiometry, 2:1) the partial pressure of oxygen has to be increased to 20 mbar to form the catalytically active RuO2(110) oxide film, while in pure oxygen environment a pressure of 10(-5) mbar is already sufficient to oxidize the Ru(0001) surface. For preparation temperatures in the range of 550-630 K a self-limiting RUO2(110) film is produced with a thickness of 1.6 nm. The RuO2(110) film grows self-acceleratedly after an induction period. The RuO2 films on Ru(0001) can readily be reduced by H-2 and CO exposures at 415 K, without an induction period.}},
author = {{He, YB and Knapp, M and Lundgren, Edvin and Over, H}},
issn = {{1520-5207}},
language = {{eng}},
number = {{46}},
pages = {{21825--21830}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Part B}},
title = {{Ru(0001) model catalyst under oxidizing and reducing reaction conditions: in-situ high-pressure surface X-ray diffraction study}},
url = {{http://dx.doi.org/10.1021/jp0538520}},
doi = {{10.1021/jp0538520}},
volume = {{109}},
year = {{2005}},
}