Available online Hydrogen (H₂) is a promising clean energy source and its separation and purification from fossil fuels and natural gas is of great significance. Microporous continuous membrane separation is an efficient and energy-saving separation method, in which membranes with a pore size less than 1 nm can better achieve size-dependent sieving of H₂. Porous aromatic framework (PAF) continuous membranes are expected to exhibit high-efficiency gas separation due to their highly connected channels as well as structural stability and channel design. Synthesis of continuous PAF membranes using facile methods remains a challenge. Here, we synthesized ultrathin continuous porphyrin-based PAF (ppPAF) membrane using an interfacial polymerization approach. The design introduced rigid porphyrin groups, resulting in a pore size of 0.7 nm for the ppPAF membrane. The ppPAF membrane showed a H₂ permeance of 709.2 gas permeation units (GPU), with a H₂/CO₂ selectivity of 78.8. The ppPAF membrane showed a H₂/CH₄ selectivity of 93.3, with a H₂ permeance of 624.8GPU. Our results provide new ideas for the synthesis of continuous PAF films.

在线可用 氢气（H ₂）是一种很有前途的清洁能源，它与化石燃料和天然气的分离和提纯具有重要意义。微孔连续膜分离是一种高效节能的分离方法，其中孔径小于1 nm的膜可以更好地实现H _{2的尺寸依赖性筛分}. 多孔芳香骨架（PAF）连续膜由于其高度连接的通道以及结构稳定性和通道设计而有望表现出高效的气体分离。使用简便方法合成连续 PAF 膜仍然是一个挑战。在这里，我们使用界面聚合方法合成了超薄连续卟啉基 PAF (ppPAF) 膜。该设计引入了刚性卟啉基团，导致 ppPAF 膜的孔径为 0.7 nm。ppPAF膜的H ₂渗透率为709.2气体渗透单位(GPU)，H ₂ /CO ₂选择性为78.8。ppPAF 膜的 H ₂ /CH ₄选择性为 93.3，H ₂624.8GPU 的性能。我们的研究结果为连续 PAF 薄膜的合成提供了新思路。