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  Oxygen diffusion in Cu-based catalysts: A probe for metal support interactions

Tarasov V, A., Klyushin, A. Y., Friedrich, M., Girgsdies, F., Schlögl, R., & Frei, E. (2020). Oxygen diffusion in Cu-based catalysts: A probe for metal support interactions. Applied Catalysis A: General, 594: 117460. doi:10.1016/j.apcata.2020.117460.

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Tarasov V, Andrey1, Autor
Klyushin, Alexander Yu1, Autor
Friedrich, Matthias2, Autor           
Girgsdies, Frank2, Autor           
Schlögl, Robert3, 4, Autor           
Frei, Elias2, Autor           
Affiliations:
1external, ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Research Department Schlögl, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023874              
4Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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 Zusammenfassung: An extended N2O titration method was applied to characterize high-performance, supported Cu catalysts: Cu/ZnO:Al (68/29/3), Cu/ZnO (80/20) and Cu/MgO (80/20). Calculation of the oxygen diffusion coefficients showed significant differences within the series of catalysts, particularly as a function of temperature. The diffusion kinetics follows a parabolic law similar to previous high temperatures studies. The apparent activation energies of the oxygen diffusion correlate inversely with the strength of the metal support interaction. The metalsupport-interaction is described by means of complementary techniques as complex interplay between structural and electronic effects located at the Cu-metal oxide interface. The significance of the metal-support-interaction, identified as relevant for the reduction and oxidation of the metallic Cu, correlates with the activity in catalytic CO oxidation. It is evident that the oxygen diffusion coefficient is indicative of the tendency of the Cu catalyst to withstand transformation into the oxides under oxidative reaction conditions controlled by the corresponding Cu-support-interaction.

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Sprache(n): eng - English
 Datum: 20202020
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: ISI: 000523558400014
DOI: 10.1016/j.apcata.2020.117460
 Art des Abschluß: -

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Titel: Applied Catalysis A: General
  Kurztitel : Appl. Catal. A
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Amsterdam : Elsevier
Seiten: - Band / Heft: 594 Artikelnummer: 117460 Start- / Endseite: - Identifikator: ISSN: 0926-860X
CoNE: https://pure.mpg.de/cone/journals/resource/954925567761_1