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Identification of a laterally mobile state during CO adsorption

Beutler, A. LU ; Jaworowski, A. J. LU ; Wiklund, M. LU ; Sandell, A. LU ; Nyholm, R. LU ; Gray, S. LU and Andersen, J. N. LU (2000) In Journal of Physics: Condensed Matter 12(6). p.765-772
Abstract

We have investigated CO adsorption at 300 K on ∼ 1.5 atomic layer thick Pd films on a Mo(110) surface by high-resolution core level photoemission. We describe how high-resolution core level spectroscopy may be utilized to study the influence of laterally mobile states on the sticking probability of molecules on such a laterally heterogeneous surface. The present Pd films are laterally heterogeneous in the sense that the additional ∼ 0.5 atomic Pd layer forms mesoscopic one-layer thick islands on top of the first Pd layer. At 300 K, CO chemisorbs on these two-layer thick islands but not on the one-layer parts of the film. The rate at which these two-layer islands are filled by CO molecules as the surface is exposed to CO is found to be... (More)

We have investigated CO adsorption at 300 K on ∼ 1.5 atomic layer thick Pd films on a Mo(110) surface by high-resolution core level photoemission. We describe how high-resolution core level spectroscopy may be utilized to study the influence of laterally mobile states on the sticking probability of molecules on such a laterally heterogeneous surface. The present Pd films are laterally heterogeneous in the sense that the additional ∼ 0.5 atomic Pd layer forms mesoscopic one-layer thick islands on top of the first Pd layer. At 300 K, CO chemisorbs on these two-layer thick islands but not on the one-layer parts of the film. The rate at which these two-layer islands are filled by CO molecules as the surface is exposed to CO is found to be consistent with a picture where CO molecules that initially impinge on the one-layer parts of the surface enter a laterally mobile state and diffuse to the two-layer islands and adsorb there. This mobile state is in many respects similar to a classical precursor state. © 2000 IOP Publishing Ltd.

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organization
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type
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publication status
published
in
Journal of Physics: Condensed Matter
volume
12
issue
6
pages
8 pages
publisher
IOP Publishing
external identifiers
  • Scopus:0005157290
ISSN
0953-8984
DOI
10.1088/0953-8984/12/6/301
language
English
LU publication?
yes
id
9e464859-5648-46c3-aeeb-b2403d2cde48
date added to LUP
2016-04-27 16:43:16
date last changed
2016-07-01 13:51:15
@misc{9e464859-5648-46c3-aeeb-b2403d2cde48,
  abstract     = {<p>We have investigated CO adsorption at 300 K on ∼ 1.5 atomic layer thick Pd films on a Mo(110) surface by high-resolution core level photoemission. We describe how high-resolution core level spectroscopy may be utilized to study the influence of laterally mobile states on the sticking probability of molecules on such a laterally heterogeneous surface. The present Pd films are laterally heterogeneous in the sense that the additional ∼ 0.5 atomic Pd layer forms mesoscopic one-layer thick islands on top of the first Pd layer. At 300 K, CO chemisorbs on these two-layer thick islands but not on the one-layer parts of the film. The rate at which these two-layer islands are filled by CO molecules as the surface is exposed to CO is found to be consistent with a picture where CO molecules that initially impinge on the one-layer parts of the surface enter a laterally mobile state and diffuse to the two-layer islands and adsorb there. This mobile state is in many respects similar to a classical precursor state. © 2000 IOP Publishing Ltd.</p>},
  author       = {Beutler, A. and Jaworowski, A. J. and Wiklund, M. and Sandell, A. and Nyholm, R. and Gray, S. and Andersen, J. N.},
  issn         = {0953-8984},
  language     = {eng},
  month        = {02},
  number       = {6},
  pages        = {765--772},
  publisher    = {ARRAY(0x894f750)},
  series       = {Journal of Physics: Condensed Matter},
  title        = {Identification of a laterally mobile state during CO adsorption},
  url          = {http://dx.doi.org/10.1088/0953-8984/12/6/301},
  volume       = {12},
  year         = {2000},
}