Ultramicroporous ZJNU-119 for High-Capacity Hydrogen Isotope Adsorption and Separation

The separation of hydrogen isotopes using physisorption-based porous materials has emerged as a promising strategy. Here, we demonstrate that the ultramicroporous framework ZJNU-119 exhibits exceptional hydrogen isotope adsorption at 77 K and 1 bar. Dynamic breakthrough experiments indicate a D2/H2 separation factor of 1.37, while density functional theory (DFT) calculations reveal that dense one-dimensional ultramicroporous channels and heteroatom-rich pore surfaces govern the host–guest interactions. These findings highlight ZJNU-119 as a robust ultramicroporous material with significant potential for energy-efficient hydrogen isotope separation.