Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Surface optical reflectance combined with x-ray techniques during gas-surface interactions

Albertin, S. LU ; Gustafson, J. LU ; Zhou, J. LU ; Pfaff, S. LU ; Shipilin, M. LU ; Blomberg, S. LU ; Merte, L. R. LU ; Gutowski, O. ; Dippel, A. C. and Zetterberg, J. LU orcid , et al. (2020) In Journal of Physics D: Applied Physics 53(22).
Abstract

High energy surface x-ray diffraction (HESXRD), x-ray reflectivity (XRR), mass spectrometry (MS) and surface optical reflectance (SOR) have been combined to simultaneously obtain sub-second information on the surface structure and morphology from a Pd(100) model catalyst during in situ oxidation at elevated temperatures and pressures resulting in Pd bulk oxide formation. The results show a strong correlation between the HESXRD and SOR signal intensities during the experiment, enabling phase determination and a time-resolved thickness estimation of the oxide by HESXRD, complemented by XRR measurements. The experiments show a remarkable sensitivity of the SOR to changes in the surface phase and morphology, in particular to the initial... (More)

High energy surface x-ray diffraction (HESXRD), x-ray reflectivity (XRR), mass spectrometry (MS) and surface optical reflectance (SOR) have been combined to simultaneously obtain sub-second information on the surface structure and morphology from a Pd(100) model catalyst during in situ oxidation at elevated temperatures and pressures resulting in Pd bulk oxide formation. The results show a strong correlation between the HESXRD and SOR signal intensities during the experiment, enabling phase determination and a time-resolved thickness estimation of the oxide by HESXRD, complemented by XRR measurements. The experiments show a remarkable sensitivity of the SOR to changes in the surface phase and morphology, in particular to the initial stages of oxidation/reduction. The data imply that SOR can detect the formation of an ultrathin PdO surface oxide layer of only 2-3 Å thickness.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
high energy surface x-ray diffraction, oxidation, Pd(100), surface optical reflectance
in
Journal of Physics D: Applied Physics
volume
53
issue
22
article number
224001
publisher
IOP Publishing
external identifiers
  • scopus:85084672771
ISSN
0022-3727
DOI
10.1088/1361-6463/ab77df
project
Combined techniques for studies of catalysis
language
English
LU publication?
yes
id
d7504455-c7dc-4408-a44e-13b6d588378c
date added to LUP
2020-06-02 15:55:11
date last changed
2024-02-16 15:30:54
@article{d7504455-c7dc-4408-a44e-13b6d588378c,
  abstract     = {{<p>High energy surface x-ray diffraction (HESXRD), x-ray reflectivity (XRR), mass spectrometry (MS) and surface optical reflectance (SOR) have been combined to simultaneously obtain sub-second information on the surface structure and morphology from a Pd(100) model catalyst during in situ oxidation at elevated temperatures and pressures resulting in Pd bulk oxide formation. The results show a strong correlation between the HESXRD and SOR signal intensities during the experiment, enabling phase determination and a time-resolved thickness estimation of the oxide by HESXRD, complemented by XRR measurements. The experiments show a remarkable sensitivity of the SOR to changes in the surface phase and morphology, in particular to the initial stages of oxidation/reduction. The data imply that SOR can detect the formation of an ultrathin PdO surface oxide layer of only 2-3 Å thickness.</p>}},
  author       = {{Albertin, S. and Gustafson, J. and Zhou, J. and Pfaff, S. and Shipilin, M. and Blomberg, S. and Merte, L. R. and Gutowski, O. and Dippel, A. C. and Zetterberg, J. and Lundgren, E. and Hejral, U.}},
  issn         = {{0022-3727}},
  keywords     = {{high energy surface x-ray diffraction; oxidation; Pd(100); surface optical reflectance}},
  language     = {{eng}},
  number       = {{22}},
  publisher    = {{IOP Publishing}},
  series       = {{Journal of Physics D: Applied Physics}},
  title        = {{Surface optical reflectance combined with x-ray techniques during gas-surface interactions}},
  url          = {{http://dx.doi.org/10.1088/1361-6463/ab77df}},
  doi          = {{10.1088/1361-6463/ab77df}},
  volume       = {{53}},
  year         = {{2020}},
}