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Title:In-situ XAS study of catalytic N[sub]2O decomposition over CuO/CeO[sub]2 catalysts
Authors:Zabilsky, Maxim (Author)
Arčon, Iztok (Author)
Djinović, Petar (Author)
Tchernychova, Elena (Author)
Pintar, Albin (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Unknown ()
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:We performed in‐situ XAS study of N 2 O decomposition over CuO/CeO 2 catalysts. The Cu K‐edge and Ce L 3 ‐edge XANES and EXAFS analyses revealed the dynamic and crucial role of Cu 2+ /Cu + and Ce 4+ /Ce 3+ ionic pairs during the catalytic reaction. We observed the initial formation of reduced Cu + and Ce 3+ species during activation in helium atmosphere at 400 °C, while concentration of these species decreased significantly during steady‐state nitrous oxide degradation reaction (2500 ppm N 2 O in He at 400 °C). In‐situ EXAFS analysis further revealed a crucial role of copper‐ceria interface in this catalytic reaction. We observed dynamic changes in average number of Cu‐Ce scatters under reaction conditions, indicating an enlarging the interface between both copper and ceria phases, where electron and oxygen transfer occurs.
Keywords:in-situ XAS, Cu EXAFS, CuO/CeO2 nanorod catalys, N2O decomposition
Year of publishing:2021
Number of pages:str. 1-35
Numbering:iss. , Vol.
COBISS_ID:49314307 Link is opened in a new window
UDC:54
ISSN on article:1867-3880
URN:URN:SI:UNG:REP:HYEPM0VM
DOI:10.1002/cctc.202001829 Link is opened in a new window
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Title:ChemCatChem
Shortened title:ChemCatChem
Publisher:Wiley-VCH
ISSN:1867-3880
COBISS.SI-ID:33675013 New window

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