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

Károly Lázár, Carole Vincent, Pál Fejes

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 extraframework 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.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalHyperfine Interactions
Volume187
Issue number1-3
DOIs
Publication statusPublished - Dec 1 2008

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Keywords

  • Coordination of iron in zeolites
  • Fe ↔ Fe redox process
  • Framework and extra-framework sites

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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