Journal Article

PUBDB-2021-02755

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Chemical Imaging of Mixed Metal Oxide Catalysts for Propylene Oxidation: From Model Binary Systems to Complex Multicomponent Systems

Sprenger, P.Extern* ; Stehle, M.Extern* ; Gaur, A.Extern* ; Weiß, J. ; Brueckner, D. B.DESY* ; Zhang, Y.Extern*DESY* ; Garrevoet, J.DESY* ; Suuronen, J.-P. ; Thomann, M. ; Fischer, A. ; Grunwaldt, J.-D. (Corresponding author)Extern* ; Sheppard, T. (Corresponding author)Extern*

2021
WILEY-VCH Verlag Weinheim

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Please use a persistent id in citations: doi:10.1002/cctc.202100054  doi:10.3204/PUBDB-2021-02755

Report No.: I-20150489

Abstract: Industrially-applied mixed metal oxide catalysts often possess an ensemble of structural components with complementary functions. Characterisation of these hierarchical systems is challenging, particularly moving from binary to quaternary systems. Here a quaternary Bi−Mo−Co−Fe oxide catalyst showing significantly greater activity than binary Bi−Mo oxides for selective propylene oxidation to acrolein was studied with chemical imaging techniques from the microscale to nanoscale. Conventional techniques like XRD and Raman spectroscopy could only distinguish a small number of components. Spatially-resolved characterisation provided a clearer picture of metal oxide phase composition, starting from elemental distribution by SEM-EDX and spatially-resolved mapping of metal oxide components by 2D Raman spectroscopy. This was extended to 3D using multiscale hard X-ray tomography with fluorescence, phase, and diffraction contrast. The identification and co-localisation of phases in 2D and 3D can assist in rationalising catalytic performance during propylene oxidation, based on studies of model, binary, or ternary catalyst systems in literature. This approach is generally applicable and attractive for characterisation of complex mixed metal oxide systems.

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Contributing Institute(s):

1. European Synchrotron Radiation Facility (ESRF)
2. externe Institute im Bereich Photon Science (KIT)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20150489 (I-20150489) (I-20150489)

Experiment(s):

1. PETRA Beamline P06 (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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