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Catalysis Letters

, Volume 144, Issue 8, pp 1384–1392 | Cite as

Model Iron Phosphate Catalysts for the Oxy-bromination of Methane

  • Runqin Wang
  • Ronghe Lin
  • Yunjie Ding
  • Jia Liu
Article

Abstract

Three kinds of bulk iron phosphates were prepared via different methods and employed as model catalysts in the oxy-bromination of methane (OBM). Na3Fe2(PO4)3 was obtained via a fluoride route for the first time that showed even superior catalytic performance than FePO4. Phase evolution from Na3Fe2(PO4)3 to Na2Fe3(PO4)3 after the OBM was confirmed both by X-ray diffraction and 57Fe Mössbauer spectroscopy. Temperature-programmed reduction of hydrogen and desorption of CH3Br revealed that the redox capacity of iron phosphates were responsible for the generation of bromine radicals on catalyst surfaces while CH3Br-involved reactions likely belonged to gas-phase reactions.

Graphical Abstract

Model iron phosphate catalysts were synthesized by three different methods. It was found that the Na3Fe2(PO4)3 catalyst prepared by a fluoride route showed superior OBM performance than the other two catalysts both with the phase of FePO4, especially for producing higher CH3Br selectivity.

Keywords

Iron phosphate Oxy-bromination Methane Methyl bromide Phase evolution 

Notes

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 21103170).

Supplementary material

10562_2014_1291_MOESM1_ESM.docx (43 kb)
Supplementary material 1 (DOCX 43 kb)

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Runqin Wang
    • 1
    • 3
  • Ronghe Lin
    • 1
  • Yunjie Ding
    • 1
    • 2
  • Jia Liu
    • 1
    • 3
  1. 1.Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianPeople’s Republic of China
  2. 2.State Key Laboratory of Catalysis, Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianPeople’s Republic of China
  3. 3.University of Chinese Academy of SciencesBeijingPeople’s Republic of China

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