Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Adsorption properties of a mixed surface studied by high resolution core level photoemission : CO/0.5 ML Pd/Rh(111)

Beutler, A. LU ; Strisland, F. ; Sandell, A. LU ; Jaworowski, A. J. LU ; Nyholm, R. LU ; Wiklund, M. and Andersen, J. N. LU (1998) In Surface Science 411(1-2). p.111-122
Abstract

The coverage-dependent adsorption properties of a laterally heterogeneous bimetallic surface have been investigated by high resolution core level photoemission and low energy electron diffraction. The specific system under study was CO adsorbed on a Rh(111) surface onto which 2D Pd islands (coverage 0.5 ML) were formed by vapor deposition. The CO adsorption properties of the heterogeneous surface were compared with CO adsorption on a Rh(111) surface covered with a full Pd monolayer and with previous results for the CO/Rh(111) system. For low exposures CO is only found on the Rh(111) patches which can be explained by diffusion of CO from the Pd islands onto Rh parts in the adsorption process. At higher exposures CO diffusion from Rh to... (More)

The coverage-dependent adsorption properties of a laterally heterogeneous bimetallic surface have been investigated by high resolution core level photoemission and low energy electron diffraction. The specific system under study was CO adsorbed on a Rh(111) surface onto which 2D Pd islands (coverage 0.5 ML) were formed by vapor deposition. The CO adsorption properties of the heterogeneous surface were compared with CO adsorption on a Rh(111) surface covered with a full Pd monolayer and with previous results for the CO/Rh(111) system. For low exposures CO is only found on the Rh(111) patches which can be explained by diffusion of CO from the Pd islands onto Rh parts in the adsorption process. At higher exposures CO diffusion from Rh to Pd is indicated. The origin of the diffusion processes can be found in the different coverage-dependent CO adsorption energies on the two surface parts.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Carbon monoxide, Chemisorption, LEED, Palladium, Rhodium, Single crystal surfaces, Soft X-ray photoelectron spectroscopy, Surface diffusion
in
Surface Science
volume
411
issue
1-2
pages
12 pages
publisher
Elsevier
external identifiers
  • scopus:0032139514
ISSN
0039-6028
language
English
LU publication?
yes
id
d29128bc-c83b-4fca-8ad5-710102ccfaca
date added to LUP
2016-04-27 16:50:33
date last changed
2022-01-30 02:55:12
@article{d29128bc-c83b-4fca-8ad5-710102ccfaca,
  abstract     = {{<p>The coverage-dependent adsorption properties of a laterally heterogeneous bimetallic surface have been investigated by high resolution core level photoemission and low energy electron diffraction. The specific system under study was CO adsorbed on a Rh(111) surface onto which 2D Pd islands (coverage 0.5 ML) were formed by vapor deposition. The CO adsorption properties of the heterogeneous surface were compared with CO adsorption on a Rh(111) surface covered with a full Pd monolayer and with previous results for the CO/Rh(111) system. For low exposures CO is only found on the Rh(111) patches which can be explained by diffusion of CO from the Pd islands onto Rh parts in the adsorption process. At higher exposures CO diffusion from Rh to Pd is indicated. The origin of the diffusion processes can be found in the different coverage-dependent CO adsorption energies on the two surface parts.</p>}},
  author       = {{Beutler, A. and Strisland, F. and Sandell, A. and Jaworowski, A. J. and Nyholm, R. and Wiklund, M. and Andersen, J. N.}},
  issn         = {{0039-6028}},
  keywords     = {{Carbon monoxide; Chemisorption; LEED; Palladium; Rhodium; Single crystal surfaces; Soft X-ray photoelectron spectroscopy; Surface diffusion}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{1-2}},
  pages        = {{111--122}},
  publisher    = {{Elsevier}},
  series       = {{Surface Science}},
  title        = {{Adsorption properties of a mixed surface studied by high resolution core level photoemission : CO/0.5 ML Pd/Rh(111)}},
  volume       = {{411}},
  year         = {{1998}},
}