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Glycine‐Functionalized CsPbBr 3 Nanocrystals for Efficient Visible‐Light Photocatalysis of CO 2 Reduction
Author(s) -
Xu Ying,
Zhang Wen,
Su Ke,
Feng YouXiang,
Mu YanFei,
Zhang Min,
Lu TongBu
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202004682
Subject(s) - photocatalysis , ligand (biochemistry) , alkyl , nanocrystal , glycine , chemistry , reagent , adsorption , halide , photochemistry , catalysis , amine gas treating , yield (engineering) , perovskite (structure) , combinatorial chemistry , materials science , inorganic chemistry , organic chemistry , nanotechnology , amino acid , receptor , biochemistry , metallurgy
Capping ligands are indispensable for the preparation of metal‐halide‐perovskite (MHP) nanocrystals (NCs) with good stability; however, the long alkyl‐chain capping ligands in conventional MHP NCs will be unfavorable for CO 2 adsorption and hinder the efficient carrier separation on the surface of MHP NCs, leading to inferior catalytic activity in artificial photosynthesis. Herein, CsPbBr 3 nanocrystals with short‐chain glycine as ligand are constructed through a facile ligand‐exchange strategy. Owing to the reduced hindrance of glycine and the presence of the amine group in glycine, the photogenerated carrier separation and CO 2 uptake capacity are noticeably improved without compromising the stability of the MHP NCs. The CsPbBr 3 nanocrystals with glycine ligands exhibit a significantly increased yield of 27.7 μmol g −1 h −1 for photocatalytic CO 2 ‐to‐CO conversion without any organic sacrificial reagents, which is over five times higher than that of control CsPbBr 3 NCs with conventional long alkyl‐chain capping ligands.