20.500.12556/DiRROS-30621 Dual-metal co-catalyst integrated graphitic carbon nitride for photocatalytic hydrogen evolution reaction Graphitic carbon nitride (g-C3N4) nanosheets are extensively used in photocatalytic applications but are often decorated with noble-metal co-catalysts to yield relevant efficiencies. Herein, we report a dual-metal co-catalyst system comprising cobalt and molybdenum (CoMo) nanoclusters uniformly integrated into heptazine g-C3N4 nanosheets for enhanced visible-light-driven hydrogen evolution reaction (HER). The intimate contact between metals as well as with gC3N4 layer was verified through X-ray absorption and X-ray photoelectron spectroscopies. Mechanistic insights obtained through a combination of experimental and computational studies suggest that Co acts as primary catalytic center, while Mo plays a preliminary role in facilitating surface hydrogen coverage, collectively accelerating the redox rates and achieving 10 times higher performance compared to bare gC3N4. Post-HER analysis reveals disintegration of co-catalyst into Co single-atoms, which then takes the leading role in sustaining the HER. The role of co-catalyst was mainly limited to the surface, acting as electron trap, reducing charge recombination and as a HER catalytic center. The composite exhibits excellent photostability over 13 h of ON/OFF illumination cycles, highlighting its potential for intermittent operations under practical conditions. This study presents a co-catalyst design strategy leveraging dual-metal synergy as a non-noble, scalable alternative to conventional noble-metal-based HER co-catalysts for solar fuel generation. hydrogen evolution reaction nanosheets reakcija nastanka vodika true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2026 The Author(s). Neznano 2026-06-30 10:43:31 2026-06-30 10:43:31 2026-07-01 03:56:02 0000-00-00 00:00:00 2027 0 0 Nasl. z nasl. zaslona; Soavtorji iz Slovenije: Marjeta Maček Kržmanc, Nina Daneu, Matjaž Spreitzer; Opis vira z dne 29. 6. 2026; str. 1-14 pt. E, [article no.] 140103 Vol. 427 Jan. 2027 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2026-01-30 2026-05-27 2026-06-04 54 1873-7153 10.1016/j.fuel.2026.140103 282943235 https://www.sciencedirect.com/science/article/pii/S0016236126018582?via%3Dihub 1 c71bbc9a-745f-11f1-9c8b-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=46615 RAZ_Gupta_Suraj_2027.pdf RAZ_Gupta_Suraj_2027.pdf 1 DAFC73890B2786831048F96C8C6FA741 5d19ace072e13ca15a6a8bb327b2d07b915bca8ea9cfafdcfa5b4a758dc67db2 28139103-7460-11f1-9c8b-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=46618 Institut Jožef Stefan 0 0 0