Oxygen transfer centers in Fe-FER and Fe-MFI zeolites: Redox behavior and Debye temperature derived from in situ Mössbauer spectra

Károly Lázár, A. N. Kotasthane, Pál Fejes

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77 and 300 K in situ Mössbauer spectra recorded after redox treatments of Fe-FER and Fe-MFI ferrisilicates are compared. Similar behavior is found for the two catalysts; reversible redox processes can be detected. Oxidation and coordination states are identified after various treatments, and the value of the average Debye temperature is estimated (260 < ΘD < 300 K). Analysis and comparison of data support the assignment of redox centers to Feframework-O-Feextra-framework pairs.

Original languageEnglish
Pages (from-to)171-177
Number of pages7
JournalCatalysis Letters
Issue number4
Publication statusPublished - Mar 1999



  • Fe-O-Fe centers
  • Ferrisilicates
  • Mössbauer spectroscopy
  • Redox behavior

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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