Maxim Zabilsky (Author), Iztok Arčon (Author), Petar Djinović (Author), Elena Tchernychova (Author), Albin Pintar (Author)

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;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 54
COBISS: 49314307 Link will open in a new window
ISSN: 1867-3880
Views: 1579
Downloads: 0
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Other data

URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 1814-1823
Volume: ǂVol. ǂ13
Issue: ǂiss. ǂ7
Chronology: 2021
DOI: 10.1002/cctc.202001829
ID: 12520182