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Transparent proton transport through a two-dimensional nanomesh material

Author

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  • Jiyu Xu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory and School of Physics, Liaoning University)

  • Hongyu Jiang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory and School of Physics, Liaoning University)

  • Yutian Shen

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory and School of Physics, Liaoning University)

  • Xin-Zheng Li

    (Peking University
    Collaborative Innovation Center of Quantum Matter)

  • E. G. Wang

    (Chinese Academy of Sciences
    Songshan Lake Materials Laboratory and School of Physics, Liaoning University
    Peking University
    Collaborative Innovation Center of Quantum Matter)

  • Sheng Meng

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Songshan Lake Materials Laboratory and School of Physics, Liaoning University
    Collaborative Innovation Center of Quantum Matter)

Abstract

Molecular sieving is of great importance to proton exchange in fuel cells, water desalination, and gas separation. Two-dimensional crystals emerge as superior materials showing desirable molecular permeability and selectivity. Here we demonstrate that a graphdiyne membrane, an experimentally fabricated member in the graphyne family, shows superior proton conductivity and perfect selectivity thanks to its intrinsic nanomesh structure. The trans-membrane hydrogen bonds across graphdiyne serve as ideal channels for proton transport in Grotthuss mechanism. The free energy barrier for proton transfer across graphdiyne is ~2.4 kJ mol−1, nearly identical to that in bulk water (2.1 kJ mol−1), enabling “transparent” proton transport at room temperature. This results in a proton conductivity of 0.6 S cm−1 for graphdiyne, four orders of magnitude greater than graphene. Considering its ultimate pore size of 0.55 nm, graphdiyne membrane blocks soluble fuel molecules and exhibits superior proton selectivity. These advantages endow graphdiyne a great potential as proton exchange material.

Suggested Citation

  • Jiyu Xu & Hongyu Jiang & Yutian Shen & Xin-Zheng Li & E. G. Wang & Sheng Meng, 2019. "Transparent proton transport through a two-dimensional nanomesh material," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11899-y
    DOI: 10.1038/s41467-019-11899-y
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    Cited by:

    1. Benbing Shi & Xiao Pang & Shunning Li & Hong Wu & Jianliang Shen & Xiaoyao Wang & Chunyang Fan & Li Cao & Tianhao Zhu & Ming Qiu & Zhuoyu Yin & Yan Kong & Yiqin Liu & Mingzheng Zhang & Yawei Liu & Fen, 2022. "Short hydrogen-bond network confined on COF surfaces enables ultrahigh proton conductivity," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Wei Liu & Jiage Yu & Tianshui Li & Shihang Li & Boyu Ding & Xinlong Guo & Aiqing Cao & Qihao Sha & Daojin Zhou & Yun Kuang & Xiaoming Sun, 2024. "Self-protecting CoFeAl-layered double hydroxides enable stable and efficient brine oxidation at 2 A cm−2," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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