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Nanocasting SiO2 into metal–organic frameworks imparts dual protection to high-loading Fe single-atom electrocatalysts

Author

Listed:
  • Long Jiao

    (University of Science and Technology of China, Hefei)

  • Rui Zhang

    (University of Science and Technology of China, Hefei)

  • Gang Wan

    (Argonne National Laboratory)

  • Weijie Yang

    (North China Electric Power University)

  • Xin Wan

    (Beihang University)

  • Hua Zhou

    (Argonne National Laboratory)

  • Jianglan Shui

    (Beihang University)

  • Shu-Hong Yu

    (University of Science and Technology of China, Hefei)

  • Hai-Long Jiang

    (University of Science and Technology of China, Hefei)

Abstract

Single-atom catalysts (SACs) have sparked broad interest recently while the low metal loading poses a big challenge for further applications. Herein, a dual protection strategy has been developed to give high-content SACs by nanocasting SiO2 into porphyrinic metal–organic frameworks (MOFs). The pyrolysis of SiO2@MOF composite affords single-atom Fe implanted N-doped porous carbon (FeSA–N–C) with high Fe loading (3.46 wt%). The spatial isolation of Fe atoms centered in porphyrin linkers of MOF sets the first protective barrier to inhibit the Fe agglomeration during pyrolysis. The SiO2 in MOF provides additional protection by creating thermally stable FeN4/SiO2 interfaces. Thanks to the high-density FeSA sites, FeSA–N–C demonstrates excellent oxygen reduction performance in both alkaline and acidic medias. Meanwhile, FeSA–N–C also exhibits encouraging performance in proton exchange membrane fuel cell, demonstrating great potential for practical application. More far-reaching, this work grants a general synthetic methodology toward high-content SACs (such as FeSA, CoSA, NiSA).

Suggested Citation

  • Long Jiao & Rui Zhang & Gang Wan & Weijie Yang & Xin Wan & Hua Zhou & Jianglan Shui & Shu-Hong Yu & Hai-Long Jiang, 2020. "Nanocasting SiO2 into metal–organic frameworks imparts dual protection to high-loading Fe single-atom electrocatalysts," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16715-6
    DOI: 10.1038/s41467-020-16715-6
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    Cited by:

    1. Jingsen Bai & Tuo Zhao & Mingjun Xu & Bingbao Mei & Liting Yang & Zhaoping Shi & Siyuan Zhu & Ying Wang & Zheng Jiang & Jin Zhao & Junjie Ge & Meiling Xiao & Changpeng Liu & Wei Xing, 2024. "Monosymmetric Fe-N4 sites enabling durable proton exchange membrane fuel cell cathode by chemical vapor modification," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    2. Xin Zhao & Ruiqi Fang & Fengliang Wang & Xiangpeng Kong & Yingwei Li, 2022. "Atomic design of dual-metal hetero-single-atoms for high-efficiency synthesis of natural flavones," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    3. Shuhu Yin & Hongyuan Yi & Mengli Liu & Jian Yang & Shuangli Yang & Bin-Wei Zhang & Long Chen & Xiaoyang Cheng & Huan Huang & Rui Huang & Yanxia Jiang & Honggang Liao & Shigang Sun, 2024. "An in situ exploration of how Fe/N/C oxygen reduction catalysts evolve during synthesis under pyrolytic conditions," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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