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CO oxidation over ZnO films on Pt(1 1 1) at near-atmospheric pressures

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons21849

Martynova,  Yulia
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons32643

Liu,  BoHong
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons39198

McBriarty,  Martin
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21575

Groot,  Irene
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22106

Shaikhutdinov,  Shamil K.
Chemical Physics, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons21524

Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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1838453.pdf
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Zitation

Martynova, Y., Liu, B., McBriarty, M., Groot, I., Bedzyk, M., Shaikhutdinov, S. K., et al. (2013). CO oxidation over ZnO films on Pt(1 1 1) at near-atmospheric pressures. Journal of Catalysis, 301, 227-232. doi:10.1016/j.jcat.2013.02.018.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-6207-3
Zusammenfassung
Well-ordered ultrathin ZnO(0 0 0 1) films were grown on Pt(1 1 1) in a layer-by-layer mode. The reactivity of the films as a function of the film thickness and coverage was examined by the CO oxidation reaction at near-atmospheric pressures. At low temperatures (∼450 K), CO2 production is found to be much higher on the films of partial coverage than on dense ZnO(0 0 0 1) films and bare Pt(1 1 1). Under reaction conditions, monolayer islands and an entire monolayer film transform into two-monolayers-thick islands, which dominate the surface of the active catalysts. The results provide an adequate structural model for elucidating the reaction mechanism on the oxide/metal boundary at technologically relevant conditions.