异质结
材料科学
选择性
光催化
化学工程
氮化碳
一氧化碳
石墨氮化碳
二氧化碳
能量转换效率
纳米技术
光化学
催化作用
化学
光电子学
有机化学
工程类
作者
Jundie Hu,Tingyu Yang,Xiaogang Yang,Jiafu Qu,Yahui Cai,Chang Ming Li
出处
期刊:Small
[Wiley]
日期:2021-12-05
卷期号:18 (7): e2105376-e2105376
被引量:65
标识
DOI:10.1002/smll.202105376
摘要
Abstract Renewable solar‐driven carbon dioxide (CO 2 ) conversion to highly valuable fuels is an economical and prospective strategy for both the energy crisis and ecological environment disorder. However, the selectivity and activity of current photocatalysts have great room for improvement due to the diversification and complexity of products. Here, an ambient‐stable 2D/2D Co 2 P@BP/g‐C 3 N 4 heterojunction is designed for highly selective and efficient photocatalytic CO 2 reduction reaction. The resulting Co 2 P@BP/g‐C 3 N 4 material has a remarkable conversion of CO 2 to carbon monoxide (CO) with an ≈96% selectivity, coupled with a dramatically increased CO generation rate of 16.21 µmol g –1 h –1 , which is 5.4 times higher than pristine graphitic carbon nitride (g‐C 3 N 4 ). In addition, this photocatalyst exhibits good ambient stability of black phosphorus (BP) without oxidation even over 180 days. The excellent photocatalytic selectivity and activity of Co 2 P@BP/g‐C 3 N 4 heterojunction are attributed to its lower energy barriers of *COOH, *CO, and *+CO in the process of CO 2 reduction, coupled with rapid charge transfer at the heterointerfaces of BP/g‐C 3 N 4 and Co 2 P/BP. This is solidly verified by both density functional theory calculation and mechanism experiments. Therefore, this work holds great promise for an ambient‐stable efficient and high selectivity photocatalyst in solar‐driven CO 2 conversion.
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