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Combining high-energy X-ray diffraction with Surface Optical Reflectance and Planar Laser Induced Fluorescence for operando catalyst surface characterization

Pfaff, S. LU ; Zhou, J. LU ; Hejral, U. LU ; Gustafson, J. LU ; Shipilin, M. LU ; Albertin, S. LU ; Blomberg, S. ; Gutowski, O. ; Dippel, A. and Lundgren, E. LU , et al. (2019) In Review of Scientific Instruments 90(3).
Abstract

We have combined three techniques, High Energy Surface X-Ray Diffraction (HESXRD), Surface Optical Reflectance, and Planar Laser Induced Fluorescence in an operando study of CO oxidation over a Pd(100) catalyst. We show that these techniques provide useful new insights such as the ability to verify that the finite region being probed by techniques such as HESXRD is representative of the sample surface as a whole. The combination is also suitable to determine when changes in gas composition or surface structure and/or morphology occur and to subsequently correlate them with high temporal resolution. In the study, we confirm previous results which show that the Pd(100) surface reaches high activity before an oxide can be detected.... (More)

We have combined three techniques, High Energy Surface X-Ray Diffraction (HESXRD), Surface Optical Reflectance, and Planar Laser Induced Fluorescence in an operando study of CO oxidation over a Pd(100) catalyst. We show that these techniques provide useful new insights such as the ability to verify that the finite region being probed by techniques such as HESXRD is representative of the sample surface as a whole. The combination is also suitable to determine when changes in gas composition or surface structure and/or morphology occur and to subsequently correlate them with high temporal resolution. In the study, we confirm previous results which show that the Pd(100) surface reaches high activity before an oxide can be detected. Furthermore, we show that the single crystal catalyst surface does not behave homogeneously, which we attribute to the surface being exposed to inhomogeneous gas conditions in mass transfer limited scenarios.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Review of Scientific Instruments
volume
90
issue
3
article number
033703
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85062905992
  • pmid:30927778
ISSN
0034-6748
DOI
10.1063/1.5086925
project
Combined techniques for studies of catalysis
language
English
LU publication?
yes
id
045504df-135f-4b8d-985a-92d91905df89
date added to LUP
2019-03-21 12:52:20
date last changed
2024-06-11 07:03:07
@article{045504df-135f-4b8d-985a-92d91905df89,
  abstract     = {{<p>We have combined three techniques, High Energy Surface X-Ray Diffraction (HESXRD), Surface Optical Reflectance, and Planar Laser Induced Fluorescence in an operando study of CO oxidation over a Pd(100) catalyst. We show that these techniques provide useful new insights such as the ability to verify that the finite region being probed by techniques such as HESXRD is representative of the sample surface as a whole. The combination is also suitable to determine when changes in gas composition or surface structure and/or morphology occur and to subsequently correlate them with high temporal resolution. In the study, we confirm previous results which show that the Pd(100) surface reaches high activity before an oxide can be detected. Furthermore, we show that the single crystal catalyst surface does not behave homogeneously, which we attribute to the surface being exposed to inhomogeneous gas conditions in mass transfer limited scenarios.</p>}},
  author       = {{Pfaff, S. and Zhou, J. and Hejral, U. and Gustafson, J. and Shipilin, M. and Albertin, S. and Blomberg, S. and Gutowski, O. and Dippel, A. and Lundgren, E. and Zetterberg, J.}},
  issn         = {{0034-6748}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{3}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Review of Scientific Instruments}},
  title        = {{Combining high-energy X-ray diffraction with Surface Optical Reflectance and Planar Laser Induced Fluorescence for operando catalyst surface characterization}},
  url          = {{http://dx.doi.org/10.1063/1.5086925}},
  doi          = {{10.1063/1.5086925}},
  volume       = {{90}},
  year         = {{2019}},
}