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Model Iron Phosphate Catalysts for the Oxy-bromination of Methane

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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.

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Acknowledgments

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

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Authors and Affiliations

  1. Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, People’s Republic of China

    Runqin Wang, Ronghe Lin, Yunjie Ding & Jia Liu

  2. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, People’s Republic of China

    Yunjie Ding

  3. University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Runqin Wang & Jia Liu

Authors
  1. Runqin Wang
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  2. Ronghe Lin
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  3. Yunjie Ding
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  4. Jia Liu
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Correspondence to Yunjie Ding.

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Wang, R., Lin, R., Ding, Y. et al. Model Iron Phosphate Catalysts for the Oxy-bromination of Methane. Catal Lett 144, 1384–1392 (2014). https://doi.org/10.1007/s10562-014-1291-8

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  • DOI: https://doi.org/10.1007/s10562-014-1291-8

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