Solvent selection and Pt decoration towards enhanced photocatalytic CO2 reduction over CsPbBr3 perovskite single crystals

被引:55
|
作者
Chen, Yi-Xin [1 ]
Xu, Yang-Fan [1 ]
Wang, Xu-Dong [1 ]
Chen, Hong-Yan [1 ]
Kuang, Dai-Bin [1 ]
机构
[1] Sun Yat Sen Univ, Sch Chem, Lehn Inst Funct Mat, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; NANOCRYSTALS; TIO2; SOLUBILITY; CONVERSION; MECHANISM; HYBRIDS; WATER;
D O I
10.1039/c9se01218d
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The photocatalytic reduction of CO2 into chemical fuels is one of the most important artificial photosynthesis processes, which can simulate the natural photosynthesis in green plants, and it will be a crucial procedure in the carbon neutral economy. In the current study, we report that inorganic CsPbBr3 perovskite submicron single crystals can exhibit photocatalytic reduction of CO2 directly on their surface with high stability and selectivity in several nonaqueous solvents. The solvent effects have been well studied, which finally leads to an approximately 25-fold enhancement in the photocatalytic reaction rate by substituting toluene with ethyl acetate. The loading of a Pt co-catalyst via a photochemical deposition process further doubled the electron yield rate, which finally reached 5.6 mu mol g(-1) h(-1), thereby implying that the optimization of the reaction media and surface catalytic activity are of key importance for the superior photocatalytic performance of halide perovskite materials.
引用
收藏
页码:2249 / 2255
页数:7
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