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Updated: Sep 20, 2025
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Published on: December 6, 2021
Breaking Barriers: Synergistic Interactions Between Pt Single Atoms and Nitrogen-Rich g-C3N4 for Maximized
Dharmendra Kumar Yadav1, Saloni Latiyan1, Rupesh S Devan2
1Department of Chemistry, University of Delhi, North Campus, Dlehi, 110007, India.
None:
Designing an active catalyst and an in situ route for the decoration of single atoms (SA) on graphitic carbon nitride (C3N4) toward efficient photocatalytic H2 evolution reaction has been a wide area of focus. However, ultralow loading of SAs and miniaturizing of the catalyst with excess nitrogen for maximized photocatalytic H2 production from water remains challenging. Herein, a simple novel method is demonstrated to fasten ultralow concentration of Pt atom (0.08 wt.%) on template-based N-rich C3N4 (C3N4.6) via thermal polymerization and acid leaching method to get a visible light irradiation-based H2 production rate of 64100 µmol g-1 h-1, with an apparent quantum yield of 25.3%, and long-term stability. The synthesis process involves initially attaching platinum complex to SBA-15, thermal polymerization of dicyandiamide, and the formation of Pt SAs anchored on the surface of C3N4.6. Pt SAs are found to coordinate and interact with the N-rich sites and alter the electronic structure of the C3N4.6. The atomically dispersed Pt species not only act as a sink for photoexcited electrons but also work as reduction sites to facilitate the faster water reduction kinetics on the surface than Pt NP decorated C3N4, highlighting the potential of ultralow-loading Pt-SACs in promoting sustainable H2 production.
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