光催化
脱氢
活动站点
催化作用
金属有机骨架
材料科学
纳米技术
化学
光化学
物理化学
有机化学
吸附
作者
Xuan Gong,Yufei Shu,Zhuo Jiang,Lingxiang Lu,Xiaohui Xu,Chao Wang,Hexiang Deng
标识
DOI:10.1002/anie.201915537
摘要
Discoveries of the accurate spatial arrangement of active sites in biological systems and cooperation between them for high catalytic efficiency are two major events in biology. However, precise tuning of these aspects is largely missing in the design of artificial catalysts. Here, a series of metal-organic frameworks (MOFs) were used, not only to overcome the limit of distance between active sites in bio-systems, but also to unveil the critical role of this distance for efficient catalysis. A linear correlation was established between photocatalytic activity and the reciprocal of inter active-site distance; a smaller distance led to higher activity. Vacancies created at selected crystallographic positions of MOFs promoted their photocatalytic efficiency. MOF-525-J33 with 15.6 Å inter active-site distance and 33 % vacancies exhibited unprecedented high turnover frequency of 29.5 h-1 in visible-light-driven acceptorless dehydrogenation of tetrahydroquinoline at room temperature.
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