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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
; ; ; ; ; ; ; and
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 (ACS)
external identifiers
  • wos:000281052700007
  • scopus:78650126934
  • pmid:20731424
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
2016-04-01 09:50:40
date last changed
2022-02-02 03:26:32
@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}},
  keywords     = {{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 (ACS)}},
  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}},
  doi          = {{10.1021/nn101241c}},
  volume       = {{4}},
  year         = {{2010}},
}