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Adv."],"published-print":{"date-parts":[[2026,2,20]]},"abstract":"<jats:p>\n                    We report the application of mixed-matrix membranes for high-temperature hydrogen separation. To enhance hydrogen selectivity, graphene nanoribbons (GNRs) were incorporated into ZIF-8 fillers, forming a physically confined structure conducive to hydrogen transport. The metal-organic framework (MOF)\/GNR filler embedded into a polyimide (PI) matrix yielded a much higher H\n                    <jats:sub>2<\/jats:sub>\n                    permeability (298 Barrer, +40%) and H\n                    <jats:sub>2<\/jats:sub>\n                    \/N\n                    <jats:sub>2<\/jats:sub>\n                    selectivity (15, +25%) than the neat PI membrane. In particular, the as-prepared asymmetric membrane achieved a H\n                    <jats:sub>2<\/jats:sub>\n                    permeance of 212\u00a0\u00b1\u00a045 Gas Permeation Unit (GPU) and H\n                    <jats:sub>2<\/jats:sub>\n                    \/N\n                    <jats:sub>2<\/jats:sub>\n                    selectivity of 19\u00a0\u00b1\u00a02 at 35\u00b0C. Remarkably, at 300\u00b0C, the H\n                    <jats:sub>2<\/jats:sub>\n                    permeance rose to 775\u00a0\u00b1\u00a0139 GPU while maintaining a H\n                    <jats:sub>2<\/jats:sub>\n                    \/N\n                    <jats:sub>2<\/jats:sub>\n                    selectivity of 13\u00a0\u00b1\u00a01, outperforming polymer-based membranes. A techno-economic analysis of an NH\n                    <jats:sub>3<\/jats:sub>\n                    cracking process demonstrated that this high permeance reduces membrane area requirements by 68.2% and lowers H\n                    <jats:sub>2<\/jats:sub>\n                    separation costs by 35.1% compared with operation at 35\u00b0C, leading to a 9.8% reduction in the levelized cost of hydrogen.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aeb4360","type":"journal-article","created":{"date-parts":[[2026,2,18]],"date-time":"2026-02-18T18:59:51Z","timestamp":1771441191000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":8,"title":["Metal-organic framework\/graphene nanoribbon\/polyimide mixed-matrix membranes for high-temperature H\n                    <sub>2<\/sub>\n                    \/N\n                    <sub>2<\/sub>\n                    separation"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5536-7366","authenticated-orcid":true,"given":"Soon Hyeong","family":"So","sequence":"first","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-9368-6067","authenticated-orcid":true,"given":"Sunwoo","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6277-2039","authenticated-orcid":true,"given":"Minsu","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biomolecular Engineering, YONSEI University, Yonsei-ro 50, 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