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Title:In-situ XAS study of catalytic N[sub]2O decomposition over CuO/CeO[sub]2 catalysts
Authors:ID Zabilsky, Maxim (Author)
ID Arčon, Iztok (Author)
ID Djinović, Petar (Author)
ID Tchernychova, Elena (Author)
ID Pintar, Albin (Author)
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Language:English
Work type:Unknown
Typology: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:Vol. , iss.
PID:20.500.12556/RUNG-6235 New window
COBISS.SI-ID:49314307 New window
UDC:54
ISSN on article:1867-3880
DOI:10.1002/cctc.202001829 New window
NUK URN:URN:SI:UNG:REP:HYEPM0VM
Publication date in RUNG:29.01.2021
Views:4410
Downloads:0
Metadata:XML DC-XML DC-RDF
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ZABILSKY, Maxim, ARČON, Iztok, DJINOVIĆ, Petar, TCHERNYCHOVA, Elena and PINTAR, Albin, 2021, In-situ XAS study of catalytic N[sub]2O decomposition over CuO/CeO[sub]2 catalysts. ChemCatChem [online]. 2021. P. 1–35. [Accessed 6 April 2025]. DOI 10.1002/cctc.202001829. Retrieved from: https://repozitorij.ung.si/IzpisGradiva.php?lang=eng&id=6235
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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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