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<p>Two-dimensional (2D) nanosheet membranes exhibit promising H<sub>2</sub> purification due to their atomic thickness. However, the synergistic interplay between in-plane pores and interlayer spacing on gas transport in 2D membrane has never been studied. Here, we engineer porous MXene nanosheets with artificially controllable in-plane pore to construct membranes with precise interlayer spacing, balancing the two types of channels for promising H<sub>2</sub>/CO<sub>2</sub> separation. Optimal porous-MXene nanosheet membranes achieve a threefold increase in H<sub>2</sub> permeance (1335 GPU) over nonporous-MXene nanosheet membranes (419 GPU) with comparable H<sub>2</sub>/CO<sub>2</sub> selectivity (118). Theory and experiment demonstrate that the larger in-plane pores provide fast mass transfer channels enhancing H<sub>2</sub> permeance, while smaller interlayer spacings as effective sieving channels govern selectivity. The Raman mapping visualizes H<sub>2</sub> transport through in-plane pores. Manufacturing of meter-scale membranes underscores industrial viability. This work establishes universal design principles in high-performance 2D nanosheet membranes for separation, adsorption and catalysis.</p>

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Balancing in-plane pores and interlayer channels of porous MXene nanosheet membranes for scalable hydrogen purification

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月14日

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  • Yufei Wang,
  • Zenan Shi,
  • Mide Luo,
  • Yeming Zhai,
  • Changfei Jing,
  • Li Ding,
  • Sheng Dai,
  • Kai-Ge Zhou,
  • Libo Li,
  • Shuming Li,
  • Jiayu Luo,
  • Yali Zhao,
  • Wufeng Wu,
  • Zong Lu,
  • Lan Lan,
  • Wenbo Li,
  • Yanying Wei,
  • Haihui Wang

摘要

Two-dimensional (2D) nanosheet membranes exhibit promising H2 purification due to their atomic thickness. However, the synergistic interplay between in-plane pores and interlayer spacing on gas transport in 2D membrane has never been studied. Here, we engineer porous MXene nanosheets with artificially controllable in-plane pore to construct membranes with precise interlayer spacing, balancing the two types of channels for promising H2/CO2 separation. Optimal porous-MXene nanosheet membranes achieve a threefold increase in H2 permeance (1335 GPU) over nonporous-MXene nanosheet membranes (419 GPU) with comparable H2/CO2 selectivity (118). Theory and experiment demonstrate that the larger in-plane pores provide fast mass transfer channels enhancing H2 permeance, while smaller interlayer spacings as effective sieving channels govern selectivity. The Raman mapping visualizes H2 transport through in-plane pores. Manufacturing of meter-scale membranes underscores industrial viability. This work establishes universal design principles in high-performance 2D nanosheet membranes for separation, adsorption and catalysis.