期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 5, 页码 6885-6893出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c23465
关键词
Pd single atoms/clusters; photocatalytic H-2 evolution; COFs; photoactive film; co-catalyst
资金
- National Natural Science Foundation of China [21733009]
The optimization of the particle size of co-catalysts is crucial for enhancing the photocatalytic activity of semiconductors.
The particle size of co-catalysts significantly affects the activity of semiconductors in photocatalysis. Herein, we report that the photocatalytic H-2 evolution (PHE) activity of a visible light responsive covalent organic framework (COF) layer supported on SiO2 nanoparticles was greatly promoted from 47.7 to 85.5 mu mol/h by decreasing the particle size of the Pd co-catalyst from 3.3 nm to single atoms/clusters. A PHE rate of 156 mmol gCOF(-1) h(-1) and apparent quantum efficiency up to 7.3% were achieved with the Pd SAs/Cs cocatalyst. The relationship between the activity of Pd in H-2 dissociation, proton reduction, and PHE rate suggests that the promotion effect of Pd SAs/Cs is mainly attributed to their enhancement in charge separation of COF layers rather than proton reduction. Furthermore, a photoactive film was fabricated and steady production of H-2 was achieved under visible light irradiation and static conditions. The optimization of the particle size of co-catalysts provides an efficient method for enhancing the photocatalytic activity of semiconductors.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据