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Steps and catalytic reactions : CO oxidation with preadsorbed O on Rh(553)

Zhang, Chu LU ; Wang, Baochang ; Hellman, Anders ; Shipilin, Mikhail LU ; Schaefer, Andreas LU ; Merte, Lindsay R. LU ; Blomberg, Sara LU ; Wang, Xueting ; Carlsson, Per Anders and Lundgren, Edvin LU , et al. (2022) In Surface Science 715.
Abstract

Industrial catalysts are often comprised of nanoparticles supported on high-surface-area oxides, in order to maximise the catalytically active surface area and thereby utilise the active material better. These nanoparticles expose steps and corners that, due to low coordination to neighboring atoms, are more reactive and, as a consequence, are often assumed to have higher catalytic activity. We have investigated the reaction between CO and preadsorbed O on a stepped Rh(553) surface, and show that CO oxidation indeed occurs faster than on the flat Rh(111) surface at the same temperature. However, we do find that this is not a result of reactions at the step sites but rather at the terrace sites close to the steps, due to in-plane... (More)

Industrial catalysts are often comprised of nanoparticles supported on high-surface-area oxides, in order to maximise the catalytically active surface area and thereby utilise the active material better. These nanoparticles expose steps and corners that, due to low coordination to neighboring atoms, are more reactive and, as a consequence, are often assumed to have higher catalytic activity. We have investigated the reaction between CO and preadsorbed O on a stepped Rh(553) surface, and show that CO oxidation indeed occurs faster than on the flat Rh(111) surface at the same temperature. However, we do find that this is not a result of reactions at the step sites but rather at the terrace sites close to the steps, due to in-plane relaxation enabled by the step. This insight can provide ways to optimize the shape of the nanoparticles to further improve the activity of certain reactions.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Catalysis, CO Oxidation, Density functional theory, Rhodium, Steps, X-Ray photoelectron spectroscopy
in
Surface Science
volume
715
article number
121928
publisher
Elsevier
external identifiers
  • scopus:85115890290
ISSN
0039-6028
DOI
10.1016/j.susc.2021.121928
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 The Authors
id
28614618-8b5a-4085-b7b1-7625397f8df2
date added to LUP
2021-10-14 10:41:21
date last changed
2022-04-27 04:48:37
@article{28614618-8b5a-4085-b7b1-7625397f8df2,
  abstract     = {{<p>Industrial catalysts are often comprised of nanoparticles supported on high-surface-area oxides, in order to maximise the catalytically active surface area and thereby utilise the active material better. These nanoparticles expose steps and corners that, due to low coordination to neighboring atoms, are more reactive and, as a consequence, are often assumed to have higher catalytic activity. We have investigated the reaction between CO and preadsorbed O on a stepped Rh(553) surface, and show that CO oxidation indeed occurs faster than on the flat Rh(111) surface at the same temperature. However, we do find that this is not a result of reactions at the step sites but rather at the terrace sites close to the steps, due to in-plane relaxation enabled by the step. This insight can provide ways to optimize the shape of the nanoparticles to further improve the activity of certain reactions.</p>}},
  author       = {{Zhang, Chu and Wang, Baochang and Hellman, Anders and Shipilin, Mikhail and Schaefer, Andreas and Merte, Lindsay R. and Blomberg, Sara and Wang, Xueting and Carlsson, Per Anders and Lundgren, Edvin and Weissenrieder, Jonas and Resta, Andrea and Mikkelsen, Anders and Andersen, Jesper N. and Gustafson, Johan}},
  issn         = {{0039-6028}},
  keywords     = {{Catalysis; CO Oxidation; Density functional theory; Rhodium; Steps; X-Ray photoelectron spectroscopy}},
  language     = {{eng}},
  month        = {{01}},
  publisher    = {{Elsevier}},
  series       = {{Surface Science}},
  title        = {{Steps and catalytic reactions : CO oxidation with preadsorbed O on Rh(553)}},
  url          = {{http://dx.doi.org/10.1016/j.susc.2021.121928}},
  doi          = {{10.1016/j.susc.2021.121928}},
  volume       = {{715}},
  year         = {{2022}},
}