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  Kinetics of Palladium Oxidation in the mbar Pressure Range: Ambient Pressure XPS Study

Zemlyanov, D., Klötzer, B., Gabasch, H., Smeltz, A., Ribeiro, F. H., Zafeiratos, S., et al. (2013). Kinetics of Palladium Oxidation in the mbar Pressure Range: Ambient Pressure XPS Study. Topics in Catalysis, 56(11), 885-895. doi:10.1007/s11244-013-0052-z.

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 Urheber:
Zemlyanov, Dmitry1, 2, Autor
Klötzer, Bernhard3, Autor
Gabasch, Harald3, Autor
Smeltz, Andrew4, Autor
Ribeiro, Fabio H.4, Autor
Zafeiratos, Spiros5, 6, Autor           
Teschner, Detre5, Autor           
Schnörch, Peter5, Autor           
Vass, Elaine M.5, 7, Autor           
Hävecker, Michael5, Autor           
Knop-Gericke, Axel5, Autor           
Schlögl, Robert5, Autor           
Affiliations:
1Birck Nanotechnology Center, Purdue University, 1205 West State Street, West Lafayette, IN 47907-2057, USA, ou_persistent22              
2Materials and Surface Science Institute, University of Limerick, Limerick, Ireland, ou_persistent22              
3Institut für Physikalische Chemie, Universität Innsbruck, 6020 Innsbruck, Austria, ou_persistent22              
4School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, IN 47907-2100, USA, ou_persistent22              
5Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
6LMSPC-UMR 7515 du CNRS, 25, rue Becquerel, 7087 Strasbourg Cedex 2, France, ou_persistent22              
7Johnson Matthey Catalysts, PO Box 1, Belasis Avenue, Billingham, Cleveland TS23 1LB, UK, ou_persistent22              

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Schlagwörter: Ambient-pressure XPS Palladium oxidation Palladium single crystal
 Zusammenfassung: Palladium oxidation was studied by ambient-pressure X-ray photoelectron spectroscopy in the mbar pressure range on the Pd(111) and Pd(110) surfaces. The oxidation kinetics on both surfaces show an induction period when the oxidation rate was low at the beginning and then accelerated. The slow initial oxidation is governed by (a) the rate of nucleus formation, and (b) the rate of oxide nucleus growth. Depth profiling varying photon energy/kinetic photoelectron energy pointed to a 3D oxidation. It is remarkable that the oxidation of Pd(110) proceeds at ~100 K lower temperatures than on Pd(111). We suggest that at the high temperature required on Pd(111) nucleation is thermodynamically controlled, and therefore, the nucleation rate decreases with temperature. On Pd(110), nucleation is predominantly kinetically controlled and thus the oxidation rate increases with temperature.

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Sprache(n): eng - English
 Datum: 2013-05-092013-08
 Publikationsstatus: Erschienen
 Seiten: 11
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1007/s11244-013-0052-z
 Art des Abschluß: -

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Titel: Topics in Catalysis
  Andere : Top. Catal.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Amsterdam, Netherlands : Baltzer Science Publishers
Seiten: - Band / Heft: 56 (11) Artikelnummer: - Start- / Endseite: 885 - 895 Identifikator: ISSN: 1022-5528
CoNE: https://pure.mpg.de/cone/journals/resource/954925584249