English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

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

MPS-Authors
/persons/resource/persons32715

Tarasov,  Andrey       
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons32779

Klyushin,  Alexander       
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons126608

Friedrich,  Matthias
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21557

Girgsdies,  Frank       
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22071

Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons104933

Frei,  Elias
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Supplementary Material (public)
There is no public supplementary material available
Citation

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.


Cite as: https://hdl.handle.net/21.11116/0000-0005-B87D-0
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.