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Mn-induced NO dissociation on Pd(100)

Jaworowski, AJ; Asmundsson, R; Uvdal, Per LU ; Gray, Struan LU and Sandell, A (2002) In Surface Science 501(1-2). p.83-92
Abstract
The changes in the NO adsorption properties of Pd(1 0 0) due to the addition of Mn have been investigated using high resolution core level photoelectron spectroscopy. The Pd(1 0 0) surface was modified by forming a c(2 x 2)-PdMn surface alloy at two different Mn coverages, giving surfaces partly and fully alloyed, respectively, as shown by scanning tunneling microscopy. NO adsorption on the alloy films was found to destroy the c(2 x 2) structure. Dissociation of the NO molecules upon heating is observed, in stark contrast to NO on the clean Pd(1 0 0) surface from which all the molecules desorb intact upon heating. The dissociation process on the c(2 x 2)-PdMn-(1 x 1)-Pd mixed surface is completed at a significantly higher temperature than... (More)
The changes in the NO adsorption properties of Pd(1 0 0) due to the addition of Mn have been investigated using high resolution core level photoelectron spectroscopy. The Pd(1 0 0) surface was modified by forming a c(2 x 2)-PdMn surface alloy at two different Mn coverages, giving surfaces partly and fully alloyed, respectively, as shown by scanning tunneling microscopy. NO adsorption on the alloy films was found to destroy the c(2 x 2) structure. Dissociation of the NO molecules upon heating is observed, in stark contrast to NO on the clean Pd(1 0 0) surface from which all the molecules desorb intact upon heating. The dissociation process on the c(2 x 2)-PdMn-(1 x 1)-Pd mixed surface is completed at a significantly higher temperature than for the homogeneous c(2 x 2) surface. It is suggested that Mn atoms give rise to NO dissociation at lower temperatures. whereas Pd atoms situated at c(2 x 2)-(1 x 1) boundaries are responsible for the NO decomposition at higher temperatures. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
synchrotron radiation photoelectron spectroscopy, single crystal surfaces, alloys, palladium, nitrogen oxides, manganese, scanning tunneling, microscopy
in
Surface Science
volume
501
issue
1-2
pages
83 - 92
publisher
Elsevier
external identifiers
  • wos:000175383400010
  • scopus:0037139262
ISSN
0039-6028
DOI
10.1016/S0039-6028(01)01666-1
language
English
LU publication?
yes
id
2f5174bb-8289-4f6e-8d23-0052a6fc71d3 (old id 338500)
date added to LUP
2007-10-24 14:29:34
date last changed
2017-01-01 07:11:05
@article{2f5174bb-8289-4f6e-8d23-0052a6fc71d3,
  abstract     = {The changes in the NO adsorption properties of Pd(1 0 0) due to the addition of Mn have been investigated using high resolution core level photoelectron spectroscopy. The Pd(1 0 0) surface was modified by forming a c(2 x 2)-PdMn surface alloy at two different Mn coverages, giving surfaces partly and fully alloyed, respectively, as shown by scanning tunneling microscopy. NO adsorption on the alloy films was found to destroy the c(2 x 2) structure. Dissociation of the NO molecules upon heating is observed, in stark contrast to NO on the clean Pd(1 0 0) surface from which all the molecules desorb intact upon heating. The dissociation process on the c(2 x 2)-PdMn-(1 x 1)-Pd mixed surface is completed at a significantly higher temperature than for the homogeneous c(2 x 2) surface. It is suggested that Mn atoms give rise to NO dissociation at lower temperatures. whereas Pd atoms situated at c(2 x 2)-(1 x 1) boundaries are responsible for the NO decomposition at higher temperatures.},
  author       = {Jaworowski, AJ and Asmundsson, R and Uvdal, Per and Gray, Struan and Sandell, A},
  issn         = {0039-6028},
  keyword      = {synchrotron radiation photoelectron spectroscopy,single crystal surfaces,alloys,palladium,nitrogen oxides,manganese,scanning tunneling,microscopy},
  language     = {eng},
  number       = {1-2},
  pages        = {83--92},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {Mn-induced NO dissociation on Pd(100)},
  url          = {http://dx.doi.org/10.1016/S0039-6028(01)01666-1},
  volume       = {501},
  year         = {2002},
}