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

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

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On oxygen diffusion N2O_final_main part_Revised manuscript.pdf (Any fulltext), 4MB
 
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 Creators:
Tarasov, Andrey1, Author              
Klyushin, Alexander1, 2, Author              
Friedrich, Matthias1, Author              
Girgsdies, Frank1, Author              
Schlögl, Robert1, 3, Author              
Frei, Elias1, Author              
Affiliations:
1Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
2Helmholtz-Zentrum Berlin für Materialen und Energie GmbH, BESSY II, Albert-Einstein-Straße 15, 12489 Berlin, Germany, ou_persistent22              
3Max-Planck-Institut für Chemische Energiekonversion, Abteilung Heterogene Reaktionen, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany, ou_persistent22              

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 Abstract: 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 metal-support-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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Language(s): eng - English
 Dates: 2020-02-072020-01-072020-02-092020-02-102020-03-25
 Publication Status: Published in print
 Pages: 10
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.apcata.2020.117460
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Title: Applied Catalysis A
  Other : Appl. Catal. A
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: 10 Volume / Issue: 594 Sequence Number: 117460 Start / End Page: - Identifier: ISSN: 0926-860X
CoNE: https://pure.mpg.de/cone/journals/resource/954925567761