Selective Anchoring of Pt NPs on Covalent Triazine-based Frameworks Derived Bridging Ligands for Boosting Photocatalytic Hydrogen Evolution

The efficient and stable production of hydrogen (H) through Pt-containing photocatalysts remains a great challenge. Herein, we develop an effective strategy to selectively and uniformly anchor Pt NPs (∼1.2 nm) on a covalent triazine-based framework photocatalyst derived bridging ligands. Compared to Pt/CTF-1, the obtained Pt/AT-CTF-1 exhibits a considerable photocatalytic H evolution rate of 562.9 μmol g h under visible light irradiation. Additionally, the strong interaction between the Pt NPs and derived bridging ligands provides remarkable stability to Pt/AT-CTF-1. Experimental investigations and photo/chemical characterization reveal the synergy of the derived bridging ligands in Pt/AT-CTF-1, which can selectively anchor the Pt NPs with homogeneous sizes and efficiently improve the transmission of charge carriers. This work provides a new perspective toward stabilizing ultrasmall nanoclusters and facilitating electron transfer in photocatalytic H evolution materials.