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Determination of NO adsorption sites on Pd(100) using core level photoemission and low energy electron diffraction

Jaworowski, A J; Asmundsson, R; Uvdal, Per LU and Sandell, A (2002) In Surface Science 501(1-2). p.74-82
Abstract
The adsorption of NO on Pd(1 0 0) is investigated with high resolution core level spectroscopy and low energy electron diffraction (LEED). Several ordered NO overlayers were observed, in agreement with earlier Studies. Our data clearly show that NO adsorbs in fourfold hollow sites at coverages tip to 0.25 -0.30 monolayer (ML) whereas at 0.5 ML only bridge sites are occupied. By a reinterpretation of previous electron energy loss spectroscopy (EELS) investigations we show that the new site assignments are in agreement the EELS data, Based on the photoemission results for the N 1s and the Pd 3d core levels we propose new structure models for the (2root2 x 2root2)R45degrees and the p(4 x 2) LEED patterns found at coverages of 0.5 and 0.25 ML,... (More)
The adsorption of NO on Pd(1 0 0) is investigated with high resolution core level spectroscopy and low energy electron diffraction (LEED). Several ordered NO overlayers were observed, in agreement with earlier Studies. Our data clearly show that NO adsorbs in fourfold hollow sites at coverages tip to 0.25 -0.30 monolayer (ML) whereas at 0.5 ML only bridge sites are occupied. By a reinterpretation of previous electron energy loss spectroscopy (EELS) investigations we show that the new site assignments are in agreement the EELS data, Based on the photoemission results for the N 1s and the Pd 3d core levels we propose new structure models for the (2root2 x 2root2)R45degrees and the p(4 x 2) LEED patterns found at coverages of 0.5 and 0.25 ML, respectively. In the latter case, it is suggested that the p(4 x 2) LEED pattern is formed from domains having p(2 x 2)-NO and c(4 x 2)-2NO unit cells. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
energy electron diffraction (LEED), low, single crystal surfaces, palladium, nitrogen oxides, chemisorption, spectroscopy, synchrotron radiation photoelectron
in
Surface Science
volume
501
issue
1-2
pages
74 - 82
publisher
Elsevier
external identifiers
  • wos:000175383400009
  • scopus:0037139328
ISSN
0039-6028
DOI
10.1016/S0039-6028(01)01642-9
language
English
LU publication?
yes
id
4cf79858-e966-441a-a7b9-97cd160456e8 (old id 338495)
date added to LUP
2007-10-24 14:24:27
date last changed
2017-01-01 07:18:04
@article{4cf79858-e966-441a-a7b9-97cd160456e8,
  abstract     = {The adsorption of NO on Pd(1 0 0) is investigated with high resolution core level spectroscopy and low energy electron diffraction (LEED). Several ordered NO overlayers were observed, in agreement with earlier Studies. Our data clearly show that NO adsorbs in fourfold hollow sites at coverages tip to 0.25 -0.30 monolayer (ML) whereas at 0.5 ML only bridge sites are occupied. By a reinterpretation of previous electron energy loss spectroscopy (EELS) investigations we show that the new site assignments are in agreement the EELS data, Based on the photoemission results for the N 1s and the Pd 3d core levels we propose new structure models for the (2root2 x 2root2)R45degrees and the p(4 x 2) LEED patterns found at coverages of 0.5 and 0.25 ML, respectively. In the latter case, it is suggested that the p(4 x 2) LEED pattern is formed from domains having p(2 x 2)-NO and c(4 x 2)-2NO unit cells.},
  author       = {Jaworowski, A J and Asmundsson, R and Uvdal, Per and Sandell, A},
  issn         = {0039-6028},
  keyword      = {energy electron diffraction (LEED),low,single crystal surfaces,palladium,nitrogen oxides,chemisorption,spectroscopy,synchrotron radiation photoelectron},
  language     = {eng},
  number       = {1-2},
  pages        = {74--82},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {Determination of NO adsorption sites on Pd(100) using core level photoemission and low energy electron diffraction},
  url          = {http://dx.doi.org/10.1016/S0039-6028(01)01642-9},
  volume       = {501},
  year         = {2002},
}