Surface Ligands Stabilized Lead Halide Perovskite Quantum Dot Photocatalyst for Visible Light‐Driven Hydrogen Generation

Solar hydrogen conversion represents a clean and economic approach to addressing global energy and environmental issues, for which efficient photocatalysts are heavily pursued. Lead halide perovskites are promising candidates for efficient phtocatalysts in solar hydrogen generation due to their attr...

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Bibliographic Details
Published in:Advanced functional materials 2019-11, Vol.29 (48), p.n/a
Main Authors: Xiao, Mu, Hao, Mengmeng, Lyu, Miaoqiang, Moore, Evan G., Zhang, Cheng, Luo, Bin, Hou, Jingwei, Lipton‐Duffin, Josh, Wang, Lianzhou
Format: Article
Language:English
Subjects:
Catalytic activity
Charge transfer
Clean energy
Control stability
Decomposition reactions
Electromagnetic absorption
Hydrogen production
Lead compounds
lead halide perovskite
Ligands
Materials science
Metal halides
Perovskites
Photocatalysis
Photocatalysts
quantum dot
Quantum dots
stability
surface ligand
Surface stability
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Summary:Solar hydrogen conversion represents a clean and economic approach to addressing global energy and environmental issues, for which efficient photocatalysts are heavily pursued. Lead halide perovskites are promising candidates for efficient phtocatalysts in solar hydrogen generation due to their attractive properties in light absorption, photogenerated charge transportation, and utilization. However, photocatalytic applications of lead halide perovskites are limited owing to their poor stability in the presence of water or other polar solvent environment. This work presents the rational control of surface ligands in achieving a good balance between stability and photocatalytic activity of CsPbBr3 quantum dots (QDs). Detailed studies reveal that the deliberate surface ligands engineering is crucial for maximizing the photocatalytic activity of CsPbBr3 QDs while maintaining good QD stability. A certain amount of surface ligands protect the CsPbBr3 QDs from decomposition in moisture during the photocatalytic reaction while still enabling efficient charge transfer for photocatalytic reactions on the surface of QDs. The well‐controlled CsPbBr3 photocatalyst shows efficient visible light‐driven H2 generation with outstanding stability (≥160 h). Rational control of surface ligands of lead halide perovskite quantum dots leads to stable and efficient photocatalytic solar hydrogen generation in a gas/solid reaction setup. This concept may provide opportunities for a broad range of metal halide perovskite quantum dots for photocatalytic H2 generation and extend potential applications to the removal of volatile pollutants and air purification.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.201905683