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Reduced Carbon Monoxide Saturation Coverage on Vicinal Palladium Surfaces : The Importance of the Adsorption Site

Garcia-Martinez, Fernando ; Dietze, Elisabeth ; Schiller, Frederik ; Gajdek, Dorotea LU ; Merte, Lindsay R. LU ; Gericke, Sabrina M. LU ; Zetterberg, Johan LU orcid ; Albertin, Stefano LU ; Lundgren, Edvin LU and Grönbeck, Henrik , et al. (2021) In Journal of Physical Chemistry Letters 12(39). p.9508-9515
Abstract

Steps at metal surfaces may influence energetics and kinetics of catalytic reactions in unexpected ways. Here, we report a significant reduction of the CO saturation coverage in Pd vicinal surfaces, which in turn is relevant for the light-off of the CO oxidation reaction. The study is based on a systematic investigation of CO adsorption on vicinal Pd(111) surfaces making use of a curved Pd crystal. A combined X-ray Photoelectron Spectroscopy and DFT analysis allows us to demonstrate that an entire row of atomic sites under Pd steps remains free of CO upon saturation at 300 K, leading to a step-density-dependent reduction of CO coverage that correlates with the observed decrease of the light-off temperature during CO oxidation in vicinal... (More)

Steps at metal surfaces may influence energetics and kinetics of catalytic reactions in unexpected ways. Here, we report a significant reduction of the CO saturation coverage in Pd vicinal surfaces, which in turn is relevant for the light-off of the CO oxidation reaction. The study is based on a systematic investigation of CO adsorption on vicinal Pd(111) surfaces making use of a curved Pd crystal. A combined X-ray Photoelectron Spectroscopy and DFT analysis allows us to demonstrate that an entire row of atomic sites under Pd steps remains free of CO upon saturation at 300 K, leading to a step-density-dependent reduction of CO coverage that correlates with the observed decrease of the light-off temperature during CO oxidation in vicinal Pd surfaces.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physical Chemistry Letters
volume
12
issue
39
pages
9508 - 9515
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85116697028
  • pmid:34559547
ISSN
1948-7185
DOI
10.1021/acs.jpclett.1c02639
project
Combined techniques for studies of catalysis
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 American Chemical Society.
id
4a463caa-5c11-4a63-8b59-4007a086d92f
date added to LUP
2021-10-27 09:26:37
date last changed
2025-01-26 18:20:41
@article{4a463caa-5c11-4a63-8b59-4007a086d92f,
  abstract     = {{<p>Steps at metal surfaces may influence energetics and kinetics of catalytic reactions in unexpected ways. Here, we report a significant reduction of the CO saturation coverage in Pd vicinal surfaces, which in turn is relevant for the light-off of the CO oxidation reaction. The study is based on a systematic investigation of CO adsorption on vicinal Pd(111) surfaces making use of a curved Pd crystal. A combined X-ray Photoelectron Spectroscopy and DFT analysis allows us to demonstrate that an entire row of atomic sites under Pd steps remains free of CO upon saturation at 300 K, leading to a step-density-dependent reduction of CO coverage that correlates with the observed decrease of the light-off temperature during CO oxidation in vicinal Pd surfaces. </p>}},
  author       = {{Garcia-Martinez, Fernando and Dietze, Elisabeth and Schiller, Frederik and Gajdek, Dorotea and Merte, Lindsay R. and Gericke, Sabrina M. and Zetterberg, Johan and Albertin, Stefano and Lundgren, Edvin and Grönbeck, Henrik and Ortega, J. Enrique}},
  issn         = {{1948-7185}},
  language     = {{eng}},
  number       = {{39}},
  pages        = {{9508--9515}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Journal of Physical Chemistry Letters}},
  title        = {{Reduced Carbon Monoxide Saturation Coverage on Vicinal Palladium Surfaces : The Importance of the Adsorption Site}},
  url          = {{http://dx.doi.org/10.1021/acs.jpclett.1c02639}},
  doi          = {{10.1021/acs.jpclett.1c02639}},
  volume       = {{12}},
  year         = {{2021}},
}