Identification of highly active iron sites in N2O-activated FE/MFI

Jifei Jia, Qi Sun, Bin Wen, Lin X. Chen, Wolfgang M H Sachtler

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

Identification of highly active iron sites in N2O-activated Fe/MFI was analyzed. Reduction in an H2 flow at 600°C of Fe/MFI prepared by chemical vapor deposition and followed by its exposure to N2O at 250°C produced a highly active state characterized by an unusual TPR spike at 200°C. In situ X-ray absorption near-edge structure, X-ray absorption fine structure data and literature data on density functional theory (DFT) calculations suggested that in this state some Fe will be present in the oxidation state of Fe4+.

Original languageEnglish (US)
Pages (from-to)7-11
Number of pages5
JournalCatalysis Letters
Volume82
Issue number1-2
DOIs
StatePublished - Sep 2002

Funding

This work was supported by the EMSI program of the National Science Foundation and the U.S. Department of Energy, OCce of Science (CHE-9810378) at the Northwestern University Institute for Environmental Catalysis (IEC). Support from the Director of the Chemistry Division, BES, U.S. Department of Energy, Grant DE-FGO2-87ER13654, is gratefully acknowledged. IEC work at Argonne National Laboratory is supported by the U.S. Department of Energy, OCce of Basic Energy Sciences, Division of Chemical Sciences, under contract W -31-109-Eng-38. The authors thank Dr. Tao Liu for his help in data collection and Dr. Jennifer Linton for her assistance in beam line operation at the BESSRC-CAT, Advanced Photon Source.

Keywords

  • Fe in MFI
  • In situ
  • NO dissociation
  • Oxidation state >3 of Fe
  • XAFS
  • XANES
  • α-sites

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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