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Chemical Probing within Catalyst Bodies by Diagonal Offset Raman Spectroscopy

Authors

  • Dr. Mathijs W. Zandbergen,

    1. Inorganic Chemistry and Catalysis group Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands)
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  • Dr. Simon D. M. Jacques,

    1. Inorganic Chemistry and Catalysis group Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands)
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  • Prof. Dr. Bert M. Weckhuysen,

    Corresponding author
    1. Inorganic Chemistry and Catalysis group Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands)
    • Inorganic Chemistry and Catalysis group Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands)
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  • Dr. Andrew M. Beale

    Corresponding author
    1. Inorganic Chemistry and Catalysis group Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands)
    • Inorganic Chemistry and Catalysis group Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht (The Netherlands)
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  • The authors would like to thank the Aspect-ACTS programme for financial support and Dr. M. G. O′Brien for providing the art work for Figure 1.

Abstract

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A vibrational fingerprint: A Raman technique has been developed to retrieve spatiotemporal chemical information from millimeter-sized catalyst bodies under preparation. An incipient wetness impregnation of γ-Al2O3 catalysts with ammonium heptamolybdate was followed. Diagonal offset Raman spectroscopy was able to distinguish between surface, subsurface, and bulk phase of the catalyst bodies (see picture).

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