Abstract
The application of static secondary ion mass spectrometry (SIMS) in combination with temperature programmed desorption (TPD) or reaction spectroscopy in surface chemistry on metal single crystal surfaces is illustrated with reactions that are relevant in the context of automotive exhaust catalysis on rhodium. In unravelling the complex mechanism of surface reactions between NO and ethylene, TPD detects the evolution of products in the gas phase while secondary ion mass spectrometry (SIMS) monitors processes on the surface in substantial detail. The possibility to derive kinetic parameters of elementary surface reactions from SIMS data is demonstrated with studies on the dissociation of NO and the formation of CN species from N and C atoms.
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