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Variety of available coordination sites for extra-framework iron in LTA and MFI zeolites

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Abstract

Variations in coordination states of extra-framework iron are studied in low iron content ferrisilicates (Si/57Fe ≈ 200) during various in situ treatments. In Fe-LTA complete Fe3+ ↔ Fe2 +  reversibility is observed. In Fe-MFI extra-framework iron can be stabilized in Fe2 +  state in spite of ambient oxidizing conditions (N2O, 620 K). Further, in Fe-MFI simultaneous stabilization of Fe2 +  and Fe3 +  may take place providing centres for redox catalytic processes.

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Authors and Affiliations

  1. Institute of Isotopes, HAS, P.O. Box 77, 1525, Budapest, Hungary

    Károly Lázár

  2. Department of Chemistry, University of Poitiers, 40 Ave. Recteur Pineau, 86022, Poitiers, France

    Carole Vincent

  3. Department of Applied and Environmental Chemistry, University of Szeged, Rerrich B. tér 1, 6720, Szeged, Hungary

    Pál Fejes

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  1. Károly Lázár
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  2. Carole Vincent
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  3. Pál Fejes
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Correspondence to Károly Lázár.

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Lázár, K., Vincent, C. & Fejes, P. Variety of available coordination sites for extra-framework iron in LTA and MFI zeolites. Hyperfine Interact 187, 1–6 (2008). https://doi.org/10.1007/s10751-008-9861-z

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