20.500.12556/DiRROS-27380 Selective semi-hydrogenation of acetylene using asingle-atom cobalt on carbon nitride photocatalyst with water as a proton source Light-powered strategies for the semi-hydrogenation of acetylene to ethylene are rapidly emerging as sustainable alternatives to the traditional thermochemical processes. The development of a robust, selective, as well as recyclable, non-noble catalyst that can be powered by visible light and uses water as proton source to accomplish this important reaction remains a key challenge. Here the first demonstration of a cobalt single-atom catalyst supported on carbon-nitride (Co−CN) as an all-in-one photocatalyst for the semi-hydrogenation of acetylene to ethylene is reported using water as the proton source, offering advantages over current hydrogenation technologies. Carbon nitride hosts the individual catalytic active sites of cobalt thus combining photosensitizer and cocatalyst in one unit, in line with first-principles modelling. Under visible light irradiation, Co−CN reduces acetylene to ethylene with stable activity for over 40 days of continuous operation, ≥99.9% selectivity, and provides means for coupling organic upgrading to produce valuable oxidation products. The heterogeneous Co−CN can be easily recovered and reused repeatedly without loss of catalytic activity and structural integrity. Thereby, the integrated and recyclable platform overcomes the need of coupling a separate photosensitizer to a catalyst, and using noble metal catalysts with an external H2 gas feed. kataliza fotokatalizatorji etilen žlahtne snovi vodik true false true Angleški jezik Slovenski jezik © 2025 The Author(s). Small Methods published by Wiley-VCH GmbH. Neznano 2026-02-04 09:40:36 2026-02-04 09:49:46 2026-02-05 03:47:54 0000-00-00 00:00:00 2026 0 0 Opis vira z dne 12. 6. 2025; Nasl. z nasl. zaslona; str. 1-9 Vol. 10, [article no.] 2500527 iss. ǂ2 22. Jan. 2026 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2026-01-22 544.3/.4 2366-9608 10.1002/smtd.202500527 239134723 https://onlinelibrary.wiley.com/doi/10.1002/smtd.202500527 1 2f29fa72-01a5-11f1-93b0-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=40034 RAZ_Fortunato_Anna_2026.pdf RAZ_Fortunato_Anna_2026.pdf 1 75495678BAB82DD487F2038A3CD0C90F 175b68126793283dc085344e9c42aa3bdcbeedc6e508509dc8c41ba032558a28 48332789-01a6-11f1-93b0-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=40035 Kemijski inštitut 0 0 0