钙钛矿(结构)
卤化物
光催化
材料科学
异质结
纳米晶
产量(工程)
吸附
催化作用
热稳定性
化学工程
纳米技术
结晶学
无机化学
物理化学
化学
光电子学
有机化学
复合材料
工程类
作者
Hui Bian,Li Deng,Shengyao Wang,Junqing Yan,Shengzhong Liu
出处
期刊:Chemical Science
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:13 (5): 1335-1341
被引量:29
摘要
Very recently, halide perovskites, especially all-inorganic CsPbBr3, have received ever-increasing attention in photocatalysis owing to their superior optoelectronic properties and thermal stability. However, there is a lack of study on their application in thermocatalysis and photo-thermocatalysis. Herein, we rationally designed a core-shell heterojunction formed by encapsulating CsPbBr3 nanoparticles with the 2D C3N4 (m-CN) layer via a solid-state reaction (denoted as m-CN@CsPbBr3). A series of experiments suggest that abundant adsorption and active sites of CO2 molecules as well as polar surfaces were obtained by utilizing m-CN-coated CsPbBr3, resulting in significant improvement in CO2 capture and charge separation. It is found that the m-CN@CsPbBr3 effectively drives the thermocatalytic reduction of CO2 in H2O vapor. By coupling light into the system, the activity for CO2-to-CO reduction is further improved with a yield up to 42.8 μmol g-1 h-1 at 150 °C, which is 8.4 and 2.3 times those of pure photocatalysis (5.1 μmol g-1 h-1) and thermocatalysis (18.7 μmol g-1 h-1), respectively. This work expands the application of general halide perovskites and provides guidance for using perovskite-based catalysts for photo-assisted thermocatalytic CO2 reduction.
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