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XAFS characterization of the binuclear iron complex in overexchanged Fe/ZSM5 – structure and reactivity

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Abstract

We have characterized, with emphasis on XAFS spectroscopy, one of the most promising DeNOx catalysts, i.e., Fe/ZSM5 prepared through the FeCl3sublimation technique. XAFS is a very useful tool for this purpose since it is element specific and can be used in situ, namely, in the presence of the reactants and at reaction temperature. In this communication it will be pointed out that the as-synthesized Fe/ZSM5 catalyst contains stable binuclear iron oxo/hydroxo-complexes. The reaction of these complexes with the probe molecule CO clearly shows that only one of the oxygen shells around iron changes while the iron contribution is not affected, the iron complex remaining binuclear.

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Authors and Affiliations

  1. Department of Inorganic Chemistry and Catalysis, Debye Institute, Utrecht University, PO Box 80083, 3508 TB, Utrecht, The Netherlands

    A.A. Battiston, J.H. Bitter & D.C. Koningsberger

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  1. A.A. Battiston
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  2. J.H. Bitter
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  3. D.C. Koningsberger
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Battiston, A., Bitter, J. & Koningsberger, D. XAFS characterization of the binuclear iron complex in overexchanged Fe/ZSM5 – structure and reactivity. Catalysis Letters 66, 75–79 (2000). https://doi.org/10.1023/A:1019079002486

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