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Spatially coupled catalytic ignition of CO oxidation on Pt: mesoscopic versus nano-scale

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons37412

Vogel,  Diana
Institute of Materials Chemistry, Vienna University of Technology;
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22071

Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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2160202.pdf
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Zitation

Spiel, C., Vogel, D., Schlögl, R., Rupprechter, G., & Suchorski, Y. (2015). Spatially coupled catalytic ignition of CO oxidation on Pt: mesoscopic versus nano-scale. Ultramicroscopy, 159, Pt. 2, 178-183. doi:10.1016/j.ultramic.2015.05.012.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0027-7D58-E
Zusammenfassung
Spatial coupling during catalytic ignition of CO oxidation on μm-sized Pt(hkl) domains of a polycrystalline Pt foil has been studied in situ by PEEM (photoemission electron microscopy) in the 10-5 mbar pressure range. The same reaction has been examined under similar conditions by FIM (field ion microscopy) on nm-sized Pt(hkl) facets of a Pt nanotip. Proper orthogonal decomposition (POD) of the digitized FIM images has been employed to analyze spatiotemporal dynamics of catalytic ignition. The results show the essential role of the sample size and of the morphology of the domain (facet) boundary in the spatial coupling in CO oxidation.