Interaction of NO2 with Model NSR Catalysts: Metal-Oxide Interaction Controls Initial NOx Storage Mechanism

Desikusumastuti A, Staudt T, Qin Z, Happel M, Laurin M, Lykhach Y, Shaikhutdinov S, Rohr F, Libuda J (2008)


Publication Status: Published

Publication Type: Journal article

Publication year: 2008

Journal

Publisher: WILEY-V C H VERLAG GMBH

Book Volume: 9

Pages Range: 2191-2197

Journal Issue: 15

DOI: 10.1002/cphc.200800550

Abstract

Using scanning tunneling microscopy (STM), molecular-beam (MB) methods and time-resolved infrared reflection absorption spectroscopy (TR-IRAS), we investigate the mechanism of initial NO, uptake on a model nitrogen storage and reduction (NSR) catalyst. The model system is prepared by co-deposition of Pd metal particles and Ba-containing oxide particles onto an ordered alumina film on NiAl(110). We show that the metal-oxide interaction between the active noble metal particles and the No, storage compound in NSR model catalysts plays an important; role in the reaction mechanism. We suggest that strong interaction facilitates reverse spillover of activated oxygen species from the NOx storage compound to the metal. This process leads to partial oxidation of the metal nanoparticles and simultaneous stabilization of the surface nitrite intermediate.

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APA:

Desikusumastuti, A., Staudt, T., Qin, Z., Happel, M., Laurin, M., Lykhach, Y.,... Libuda, J. (2008). Interaction of NO2 with Model NSR Catalysts: Metal-Oxide Interaction Controls Initial NOx Storage Mechanism. ChemPhysChem, 9(15), 2191-2197. https://dx.doi.org/10.1002/cphc.200800550

MLA:

Desikusumastuti, Aine, et al. "Interaction of NO2 with Model NSR Catalysts: Metal-Oxide Interaction Controls Initial NOx Storage Mechanism." ChemPhysChem 9.15 (2008): 2191-2197.

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