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

K. Lázár, Carole Vincent, P. Fejes

Research output: Article

4 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 - 2008

Fingerprint

Zeolites
zeolites
Iron
iron
Stabilization
stabilization

ASJC Scopus subject areas

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

Cite this

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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 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.",
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T1 - Variety of available coordination sites for extra-framework iron in LTA and MFI zeolites

AU - Lázár, K.

AU - Vincent, Carole

AU - Fejes, P.

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - Coordination of iron in zeolites

KW - Fe ↔ Fe redox process

KW - Framework and extra-framework sites

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JO - Hyperfine Interaction

JF - Hyperfine Interaction

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