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Infrared surface spectroscopy and surface optical reflectance for operando catalyst surface characterization

Rämisch, Lisa LU ; Gericke, Sabrina M. LU ; Pfaff, Sebastian LU ; Lundgren, Edvin LU and Zetterberg, Johan LU orcid (2022) In Applied Surface Science 578.
Abstract

Using a new sample environment, the two operando surface diagnostic techniques two-dimensional surface optical reflection (2D-SOR) and polarization-modulated infrared reflection–absorption spectroscopy (PM-IRRAS) have been combined with mass spectrometry (MS) to characterize a catalytic reaction. With both techniques integrated in a custom-built setup, we can correlate molecular information of the adsorbed surface species from PM-IRRAS with information about oxide formation on the sample from 2D-SOR. The new setup was evaluated by performing CO oxidation over a Palladium single crystal Pd(1 0 0) surface. The results reveal that the macroscopic and the microscopic molecular behavior correlate well. When the CO adsorption peak disappears... (More)

Using a new sample environment, the two operando surface diagnostic techniques two-dimensional surface optical reflection (2D-SOR) and polarization-modulated infrared reflection–absorption spectroscopy (PM-IRRAS) have been combined with mass spectrometry (MS) to characterize a catalytic reaction. With both techniques integrated in a custom-built setup, we can correlate molecular information of the adsorbed surface species from PM-IRRAS with information about oxide formation on the sample from 2D-SOR. The new setup was evaluated by performing CO oxidation over a Palladium single crystal Pd(1 0 0) surface. The results reveal that the macroscopic and the microscopic molecular behavior correlate well. When the CO adsorption peak disappears in the PM-IRRAS spectrum, the formation of a well-defined ultra-thin surface oxide is observed in the 2D-SOR trend. We discuss the benefits and limitations of the two techniques as well as their potential for further studies of catalytic reactions at both gas–solid and liquid–solid interfaces.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CO oxidation, Heterogeneous catalysis, Operando techniques, Pd(1 0 0), PM-IRRAS, Surface optical reflectance (2D-SOR)
in
Applied Surface Science
volume
578
article number
152048
publisher
Elsevier
external identifiers
  • scopus:85120883353
ISSN
0169-4332
DOI
10.1016/j.apsusc.2021.152048
project
Combined techniques for studies of catalysis
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 The Authors
id
85231b26-86be-4cf1-b748-1ed1320a3e36
date added to LUP
2022-01-11 17:16:49
date last changed
2023-11-09 03:05:05
@article{85231b26-86be-4cf1-b748-1ed1320a3e36,
  abstract     = {{<p>Using a new sample environment, the two operando surface diagnostic techniques two-dimensional surface optical reflection (2D-SOR) and polarization-modulated infrared reflection–absorption spectroscopy (PM-IRRAS) have been combined with mass spectrometry (MS) to characterize a catalytic reaction. With both techniques integrated in a custom-built setup, we can correlate molecular information of the adsorbed surface species from PM-IRRAS with information about oxide formation on the sample from 2D-SOR. The new setup was evaluated by performing CO oxidation over a Palladium single crystal Pd(1 0 0) surface. The results reveal that the macroscopic and the microscopic molecular behavior correlate well. When the CO adsorption peak disappears in the PM-IRRAS spectrum, the formation of a well-defined ultra-thin surface oxide is observed in the 2D-SOR trend. We discuss the benefits and limitations of the two techniques as well as their potential for further studies of catalytic reactions at both gas–solid and liquid–solid interfaces.</p>}},
  author       = {{Rämisch, Lisa and Gericke, Sabrina M. and Pfaff, Sebastian and Lundgren, Edvin and Zetterberg, Johan}},
  issn         = {{0169-4332}},
  keywords     = {{CO oxidation; Heterogeneous catalysis; Operando techniques; Pd(1 0 0); PM-IRRAS; Surface optical reflectance (2D-SOR)}},
  language     = {{eng}},
  month        = {{03}},
  publisher    = {{Elsevier}},
  series       = {{Applied Surface Science}},
  title        = {{Infrared surface spectroscopy and surface optical reflectance for operando catalyst surface characterization}},
  url          = {{http://dx.doi.org/10.1016/j.apsusc.2021.152048}},
  doi          = {{10.1016/j.apsusc.2021.152048}},
  volume       = {{578}},
  year         = {{2022}},
}