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Visible-Light-Induced Nanoparticle Assembly for Effective Hydrogen Photogeneration

Research paper by Yang Wang, Xu-Bing Li, Hao-Lin Wu, Yichen Yang, Zan Liu, Li-Ping Zhang, Chen-Ho Tung, Li-Zhu Wu

Indexed on: 02 Apr '19Published on: 04 Mar '19Published in: ACS Sustainable Chemistry & Engineering



Abstract

A QD/Pt assembly, obtained by in situ aerobic visible light irradiation and sonication, enables H2 photogeneration with effective and durable performance.Visible-light-induced nanoparticle assembly consisting of quantum dots (QDs) and Pt nanoparticles (NPs) has been achieved. The assembled nanoparticle joined a single Pt nanoparticle and multiple QDs together through controllable oxidation of thiol ligands on QDs under aerobic visible light irradiation and sonication. With an optimal ratio of QDs to Pt NPs (ca. 475:1), the assembly could achieve consecutive electron transfer from photoexcited QDs to Pt NP and evolve H2 gas with a constant rate of ∼13.9 μmol h–1 from triethylamine (TEA) during 70 h, corresponding to a turnover number (TON) of 1.4 × 107 mol H2 per mol Pt NPs. Our work shows that the assembled architecture of semiconducting QDs is a promising strategy for effective and durable H2 photogeneration.

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