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Low-Temperature CO Oxidation on Ni(111) and on a Au/Ni(111) Surface Alloy

Knudsen, Jan; Merte, Lindsay R.; Peng, Guowen; Vang, Ronnie T.; Resta, Andrea LU ; Laegsgaard, Erik; Andersen, Jesper N LU ; Mavrikakis, Manos and Besenbacher, Flemming (2010) In ACS Nano 4(8). p.4380-4387
Abstract
From an interplay between scanning tunneling microscopy, temperature programmed desorption, X-ray photoelectron spectroscopy, and density functional theory calculations we have studied low-temperature CO oxidation on Au/Ni(111) surface alloys and on Ni(111). We show that an oxide is formed on both the Ni(111) and the Au/Ni(111) surfaces when oxygen is dosed at 100 K, and that CO can be oxidized at 100 K on both of these surfaces in the presence of weakly bound oxygen. We suggest that low-temperature CO oxidation can be rationalized by CO oxidation on O-2-saturated NiO(111) surfaces, and show that the main effect of Au in the Au/Ni(111) surface alloy is to block the formation of carbonate and thereby increase the low-temperature CO2... (More)
From an interplay between scanning tunneling microscopy, temperature programmed desorption, X-ray photoelectron spectroscopy, and density functional theory calculations we have studied low-temperature CO oxidation on Au/Ni(111) surface alloys and on Ni(111). We show that an oxide is formed on both the Ni(111) and the Au/Ni(111) surfaces when oxygen is dosed at 100 K, and that CO can be oxidized at 100 K on both of these surfaces in the presence of weakly bound oxygen. We suggest that low-temperature CO oxidation can be rationalized by CO oxidation on O-2-saturated NiO(111) surfaces, and show that the main effect of Au in the Au/Ni(111) surface alloy is to block the formation of carbonate and thereby increase the low-temperature CO2 production. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
X-ray, photoelectron spectroscopy, scanning tunneling microscopy, low-temperature oxidation, AuNi surface alloy, low-temperature CO oxidation, nickel oxide
in
ACS Nano
volume
4
issue
8
pages
4380 - 4387
publisher
The American Chemical Society
external identifiers
  • wos:000281052700007
  • scopus:78650126934
ISSN
1936-086X
DOI
10.1021/nn101241c
language
English
LU publication?
yes
id
d536b4e8-7311-420b-88d5-a6d07c6547d0 (old id 1674007)
date added to LUP
2010-09-22 14:26:16
date last changed
2018-05-29 09:52:05
@article{d536b4e8-7311-420b-88d5-a6d07c6547d0,
  abstract     = {From an interplay between scanning tunneling microscopy, temperature programmed desorption, X-ray photoelectron spectroscopy, and density functional theory calculations we have studied low-temperature CO oxidation on Au/Ni(111) surface alloys and on Ni(111). We show that an oxide is formed on both the Ni(111) and the Au/Ni(111) surfaces when oxygen is dosed at 100 K, and that CO can be oxidized at 100 K on both of these surfaces in the presence of weakly bound oxygen. We suggest that low-temperature CO oxidation can be rationalized by CO oxidation on O-2-saturated NiO(111) surfaces, and show that the main effect of Au in the Au/Ni(111) surface alloy is to block the formation of carbonate and thereby increase the low-temperature CO2 production.},
  author       = {Knudsen, Jan and Merte, Lindsay R. and Peng, Guowen and Vang, Ronnie T. and Resta, Andrea and Laegsgaard, Erik and Andersen, Jesper N and Mavrikakis, Manos and Besenbacher, Flemming},
  issn         = {1936-086X},
  keyword      = {X-ray,photoelectron spectroscopy,scanning tunneling microscopy,low-temperature oxidation,AuNi surface alloy,low-temperature CO oxidation,nickel oxide},
  language     = {eng},
  number       = {8},
  pages        = {4380--4387},
  publisher    = {The American Chemical Society},
  series       = {ACS Nano},
  title        = {Low-Temperature CO Oxidation on Ni(111) and on a Au/Ni(111) Surface Alloy},
  url          = {http://dx.doi.org/10.1021/nn101241c},
  volume       = {4},
  year         = {2010},
}