title: Real-Time Gas-Phase Imaging over a Pd(110) Catalyst during CO Oxidation by Means of Planar Laser-Induced Fluorescence.
abstract: The gas composition surrounding a catalytic sample has direct impact on its surface structure, which is essential when in situ investigations of model catalysts are performed. Herein a study of the gas phase close to a Pd(110) surface during CO oxidation under semirealistic conditions is presented. Images of the gas phase, provided by planar laser-induced fluorescence, clearly visualize the formation of a boundary layer with a significantly lower CO partial pressure close to the catalytically active surface, in comparison to the overall concentration as detected by mass spectrometry. The CO partial pressure variation within the boundary layer will have a profound effect on the catalysts' surface structure and function and needs to be taken into consideration for in situ model catalysis studies.
authors.affiliation: Division of Synchrotron Radiation Research and Division of Combustion Physics, Lund University , Box 118, SE-221 00 Lund, Sweden.
authors.forename: Sara
authors.initials: S
authors.lastname: Blomberg
authors.affiliation: Division of Synchrotron Radiation Research and Division of Combustion Physics, Lund University , Box 118, SE-221 00 Lund, Sweden.
authors.forename: Christian
authors.initials: C
authors.lastname: Brackmann
authors.affiliation: Division of Synchrotron Radiation Research and Division of Combustion Physics, Lund University , Box 118, SE-221 00 Lund, Sweden.
authors.forename: Johan
authors.initials: J
authors.lastname: Gustafson
authors.affiliation: Division of Synchrotron Radiation Research and Division of Combustion Physics, Lund University , Box 118, SE-221 00 Lund, Sweden.
authors.forename: Marcus
authors.initials: M
authors.lastname: Aldén
authors.affiliation: Division of Synchrotron Radiation Research and Division of Combustion Physics, Lund University , Box 118, SE-221 00 Lund, Sweden.
authors.forename: Edvin
authors.initials: E
authors.lastname: Lundgren
authors.affiliation: Division of Synchrotron Radiation Research and Division of Combustion Physics, Lund University , Box 118, SE-221 00 Lund, Sweden.
authors.forename: Johan
authors.initials: J
authors.lastname: Zetterberg
keywords: CO oxidation; Pd(110); catalysis; gas phase; imaging; laser-induced fluorescence