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Diana Vogel, Dr. Christian Spiel, Prof. Dr. Yuri Suchorski, Adriana Trinchero, Prof. Dr. Robert Schlögl, Prof. Dr. Henrik Grönbeck and Prof. Dr. Günther Rupprechter Local Catalytic Ignition during CO Oxidation on Low-Index Pt and Pd Surfaces: A Combined PEEM, MS, and DFT Study Angewandte Chemie International Edition 51

Version of Record online: 7 SEP 2012 | DOI: 10.1002/anie.201204031

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Shedding light on light-off: Photoemission electron microscopy, DFT, and microkinetic modeling were used to examine the local kinetics in the CO oxidation on individual grains of a polycrystalline sample. It is demonstrated that catalytic ignition (“light-off”) occurs easier on Pd(hkl) domains than on corresponding Pt(hkl) domains. The isothermal determination of kinetic transitions, commonly used in surface science, is fully consistent with the isobaric reactivity monitoring applied in technical catalysis.

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