Combining Planar Laser-Induced Fluorescence with Stagnation Point Flows for Small Single-Crystal Model Catalysts: CO Oxidation on a Pd(100)

Summary, in English

A stagnation flow reactor has been designed and characterized for both experimental and modeling studies of single-crystal model catalysts in heterogeneous catalysis. Using CO oxidation over a Pd(100) single crystal as a showcase, we have employed planar laser-induced fluorescence (PLIF) to visualize the CO₂ distribution over the catalyst under reaction conditions and subsequently used the 2D spatially resolved gas phase data to characterize the stagnation flow reactor. From a comparison of the experimental data and the stagnation flow model, it was found that characteristic stagnation flow can be achieved with the reactor. Furthermore, the combined stagnation flow/PLIF/modeling approach makes it possible to estimate the turnover frequency (TOF) of the catalytic surface from the measured CO₂ concentration profiles above the surface and to predict the CO₂, CO and O2 concentrations at the surface under reaction conditions.

• Author: Jianfeng Zhou; Sebastian Matera; Sebastian Pfaff; Sara Blomberg; Edvin Lundgren; Johan Zetterberg
• Department/s: Combustion Physics; Division of Chemical Engineering; Synchrotron Radiation Research; NanoLund: Centre for Nanoscience
• Publishing year: 2019
• Language: English
• Publication/Series: Catalysts
• Volume: 9
• Issue: 5
• Links: http://dx.doi.org/10.3390/catal9050484
• Document type: Journal article
• Publisher: MDPI AG
• Topic: Atom and Molecular Physics and Optics; Condensed Matter Physics (including Material Physics, Nano Physics)
• Status: Published
• Project: Combined techniques for studies of catalysis
• ISBN/ISSN/Other: ISSN: 2073-4344