Journal Article

PUBDB-2021-00706

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In‐situ XAS study of catalytic N$_{2}$O decomposition over CuO/CeO$_{2}$ catalysts

Zabilskiy, M.Extern* ; Arčon, I. (Corresponding author)Extern* ; Djinović, P.Extern* ; Tchernychova, E. ; Pintar, A.

2021
WILEY-VCH Verlag Weinheim

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Please use a persistent id in citations: doi:10.1002/cctc.202001829  doi:10.3204/PUBDB-2021-00706

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.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20180898 EC (I-20180898-EC) (I-20180898-EC)
3. FS-Proposal: I-20160044 EC (I-20160044-EC) (I-20160044-EC)
4. CALIPSOplus - Convenient Access to Light Sources Open to Innovation, Science and to the World (730872) (730872)

Experiment(s):

1. PETRA Beamline P65 (PETRA III)

Appears in the scientific report 2021

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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