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Experimental and theoretical study of oxygen adsorption structures on Ag(111)

Schnadt, Joachim LU ; Knudsen, Jan; Hu, Xiao Liang; Michaelides, Angelos; Vang, Ronnie T.; Reuter, Karsten; Li, Zheshen; Laegsgaard, Erik; Scheffler, Matthias and Besenbacher, Flemming (2009) In Physical Review B (Condensed Matter and Materials Physics) 80(7).
Abstract
The oxidized Ag(111) surface has been studied by a combination of experimental and theoretical methods, scanning tunneling microscopy, x-ray photoelectron spectroscopy, and density functional theory. A large variety of different surface structures is found, depending on the detailed preparation conditions. The observed structures fall into four classes: (a) individually chemisorbed atomic oxygen atoms, (b) three different oxygen overlayer structures, including the well-known p(4x4) phase, formed from the same Ag-6 and Ag-10 building blocks, (c) a c(4x8) structure not previously observed, and (d) at higher oxygen coverages structures characterized by stripes along the high-symmetry directions of the Ag(111) substrate. Our analysis provides... (More)
The oxidized Ag(111) surface has been studied by a combination of experimental and theoretical methods, scanning tunneling microscopy, x-ray photoelectron spectroscopy, and density functional theory. A large variety of different surface structures is found, depending on the detailed preparation conditions. The observed structures fall into four classes: (a) individually chemisorbed atomic oxygen atoms, (b) three different oxygen overlayer structures, including the well-known p(4x4) phase, formed from the same Ag-6 and Ag-10 building blocks, (c) a c(4x8) structure not previously observed, and (d) at higher oxygen coverages structures characterized by stripes along the high-symmetry directions of the Ag(111) substrate. Our analysis provides a detailed explanation of the atomic-scale geometry of the Ag-6/Ag-10 building block structures and the c(4x8) and stripe structures are discussed in detail. The observation of many different and co-existing structures implies that the O/Ag(111) system is characterized by a significantly larger degree of complexity than previously anticipated, and this will impact our understanding of oxidation catalysis processes on Ag catalysts. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
80
issue
7
publisher
American Physical Society
external identifiers
  • wos:000269638900096
  • scopus:70349121323
ISSN
1098-0121
DOI
10.1103/PhysRevB.80.075424
language
English
LU publication?
yes
id
6297001f-dd47-431f-baad-08410cc150e4 (old id 1474968)
date added to LUP
2009-10-02 11:41:12
date last changed
2017-11-19 03:59:11
@article{6297001f-dd47-431f-baad-08410cc150e4,
  abstract     = {The oxidized Ag(111) surface has been studied by a combination of experimental and theoretical methods, scanning tunneling microscopy, x-ray photoelectron spectroscopy, and density functional theory. A large variety of different surface structures is found, depending on the detailed preparation conditions. The observed structures fall into four classes: (a) individually chemisorbed atomic oxygen atoms, (b) three different oxygen overlayer structures, including the well-known p(4x4) phase, formed from the same Ag-6 and Ag-10 building blocks, (c) a c(4x8) structure not previously observed, and (d) at higher oxygen coverages structures characterized by stripes along the high-symmetry directions of the Ag(111) substrate. Our analysis provides a detailed explanation of the atomic-scale geometry of the Ag-6/Ag-10 building block structures and the c(4x8) and stripe structures are discussed in detail. The observation of many different and co-existing structures implies that the O/Ag(111) system is characterized by a significantly larger degree of complexity than previously anticipated, and this will impact our understanding of oxidation catalysis processes on Ag catalysts.},
  author       = {Schnadt, Joachim and Knudsen, Jan and Hu, Xiao Liang and Michaelides, Angelos and Vang, Ronnie T. and Reuter, Karsten and Li, Zheshen and Laegsgaard, Erik and Scheffler, Matthias and Besenbacher, Flemming},
  issn         = {1098-0121},
  language     = {eng},
  number       = {7},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Experimental and theoretical study of oxygen adsorption structures on Ag(111)},
  url          = {http://dx.doi.org/10.1103/PhysRevB.80.075424},
  volume       = {80},
  year         = {2009},
}