期刊
SURFACE SCIENCE
卷 643, 期 -, 页码 52-58出版社
ELSEVIER
DOI: 10.1016/j.susc.2015.05.021
关键词
Photoemission electron microscopy; Catalysis; CO oxidation; Catalytic ignition; Platinum; Palladium
资金
- Austrian Science Fund (FWF) [SFB F45 FOXSI]
In the present contribution we present an overview of our recent studies using the kinetics by imaging approach for CO oxidation on heterogeneous model systems. The method is based on the correlation of the PEEM image intensity with catalytic activity: scaled down to the pm-sized surface regions, such correlation allows simultaneous local kinetic measurements on differently oriented individual domains of a polycrystalline metal-foil, including the construction of local kinetic phase diagrams. This allows spatially- and component-resolved kinetic studies and, e.g., a direct comparison of inherent catalytic properties of Pt(hkl)- and Pd(hkl)-domains or supported pm-sized Pd-powder agglomerates, studies of the local catalytic ignition and the role of defects and grain boundaries in the local reaction kinetics. (C) 2015 The Authors. Published by Elsevier B.V.
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