Hierarchically porous and single Zn atom-embedded carbon molecular sieves for H2 separations

Leiqing Hu, Won-Il Lee, Soumyabrata Roy, Ashwanth Subramanian, Kim Kisslinger, Lingxiang Zhu, Shouhong Fan, Sooyeon Hwang, Vinh T. Bui, Thien Tran, Gengyi Zhang, Yifu Ding, Pulickel M. Ajayan, Chang-Yong Nam and Haiqing Lin ()
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Leiqing Hu: University at Buffalo, The State University of New York
Won-Il Lee: Stony Brook University
Soumyabrata Roy: Rice University
Ashwanth Subramanian: Stony Brook University
Kim Kisslinger: Brookhaven National Laboratory
Lingxiang Zhu: National Energy Technology Laboratory
Shouhong Fan: University of Colorado
Sooyeon Hwang: Brookhaven National Laboratory
Vinh T. Bui: University at Buffalo, The State University of New York
Thien Tran: University at Buffalo, The State University of New York
Gengyi Zhang: University at Buffalo, The State University of New York
Yifu Ding: University of Colorado
Pulickel M. Ajayan: Rice University
Chang-Yong Nam: Stony Brook University
Haiqing Lin: University at Buffalo, The State University of New York

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Hierarchically porous materials containing sub-nm ultramicropores with molecular sieving abilities and microcavities with high gas diffusivity may realize energy-efficient membranes for gas separations. However, rationally designing and constructing such pores into large-area membranes enabling efficient H2 separations remains challenging. Here, we report the synthesis and utilization of hybrid carbon molecular sieve membranes with well-controlled nano- and micro-pores and single zinc atoms and clusters well-dispersed inside the nanopores via the carbonization of supramolecular mixed matrix materials containing amorphous and crystalline zeolitic imidazolate frameworks. Carbonization temperature is used to fine-tune pore sizes, achieving ultrahigh selectivity for H2/CO2 (130), H2/CH4 (2900), H2/N2 (880), and H2/C2H6 (7900) with stability against water vapor and physical aging during a continuous 120-h test.

Date: 2024
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DOI: 10.1038/s41467-024-49961-z

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