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Visualizing the Gas Diffusion Induced Ignition of a Catalytic Reaction

Pfaff, Sebastian LU ; Rämisch, Lisa LU ; Gericke, Sabrina Maria LU ; Larsson, Alfred LU ; Lundgren, Edvin LU and Zetterberg, Johan LU orcid (2022) In ACS Catalysis p.6589-6595
Abstract
Many surface science experiments within heterogeneous catalysis are now conducted in realistic conditions at higher pressures. At these pressures, localized gas conditions will form throughout the reactor. Understanding these gas conditions and their interaction with the catalyst surface at relevant time scales and with spatial resolution is important. To address this issue, we use a combination of techniques that can resolve the gas and surface composition with enough temporal and spatial resolution to show even very rapid gas–surface interactions. Planar laser-induced fluorescence is used to monitor the gas phase, thermography visualizes the surface temperature, and 2D-surface optical reflectance measurements show oxide growth. By... (More)
Many surface science experiments within heterogeneous catalysis are now conducted in realistic conditions at higher pressures. At these pressures, localized gas conditions will form throughout the reactor. Understanding these gas conditions and their interaction with the catalyst surface at relevant time scales and with spatial resolution is important. To address this issue, we use a combination of techniques that can resolve the gas and surface composition with enough temporal and spatial resolution to show even very rapid gas–surface interactions. Planar laser-induced fluorescence is used to monitor the gas phase, thermography visualizes the surface temperature, and 2D-surface optical reflectance measurements show oxide growth. By combining these techniques in an operando experiment, we demonstrate that the spatial evolution of the catalytic ignition of CO oxidation over Pd(100) at higher pressures is driven by localized gas conditions, emphasizing the need for 2D gas-phase measurements when studying model catalysts in high-pressure conditions. (Less)
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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
heterogeneous catalysis, operando, thermography, Pd(100), catalytic ignition, planar laser-induced fluorescence
in
ACS Catalysis
issue
12
pages
7 pages
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85133127876
ISSN
2155-5435
DOI
10.1021/acscatal.2c01666
project
Combined techniques for studies of catalysis
language
English
LU publication?
yes
id
5bf8bcb6-f741-491d-bcb2-8c9bd56b1871
date added to LUP
2022-08-24 16:29:36
date last changed
2023-11-18 02:55:48
@article{5bf8bcb6-f741-491d-bcb2-8c9bd56b1871,
  abstract     = {{Many surface science experiments within heterogeneous catalysis are now conducted in realistic conditions at higher pressures. At these pressures, localized gas conditions will form throughout the reactor. Understanding these gas conditions and their interaction with the catalyst surface at relevant time scales and with spatial resolution is important. To address this issue, we use a combination of techniques that can resolve the gas and surface composition with enough temporal and spatial resolution to show even very rapid gas–surface interactions. Planar laser-induced fluorescence is used to monitor the gas phase, thermography visualizes the surface temperature, and 2D-surface optical reflectance measurements show oxide growth. By combining these techniques in an operando experiment, we demonstrate that the spatial evolution of the catalytic ignition of CO oxidation over Pd(100) at higher pressures is driven by localized gas conditions, emphasizing the need for 2D gas-phase measurements when studying model catalysts in high-pressure conditions.}},
  author       = {{Pfaff, Sebastian and Rämisch, Lisa and Gericke, Sabrina Maria and Larsson, Alfred and Lundgren, Edvin and Zetterberg, Johan}},
  issn         = {{2155-5435}},
  keywords     = {{heterogeneous catalysis; operando, thermography; Pd(100); catalytic ignition; planar laser-induced fluorescence}},
  language     = {{eng}},
  month        = {{05}},
  number       = {{12}},
  pages        = {{6589--6595}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{ACS Catalysis}},
  title        = {{Visualizing the Gas Diffusion Induced Ignition of a Catalytic Reaction}},
  url          = {{http://dx.doi.org/10.1021/acscatal.2c01666}},
  doi          = {{10.1021/acscatal.2c01666}},
  year         = {{2022}},
}