催化作用
钌
炔烃
分子筛
纳米技术
金属有机骨架
金属
多相催化
区域选择性
材料科学
吸附
化学
化学工程
组合化学
有机化学
工程类
作者
Shufang Ji,Yuanjun Chen,Shu Zhao,Wenxing Chen,Lijun Shi,Yu Wang,Juncai Dong,Zhi Li,Fuwei Li,Chen Chen,Qing Peng,Jun Li,Dingsheng Wang,Yadong Li
标识
DOI:10.1002/anie.201814182
摘要
Incorporating atomically dispersed metal species into functionalized metal-organic frameworks (MOFs) can integrate their respective merits for catalysis. A cage-controlled encapsulation and reduction strategy is used to fabricate single Ru atoms and triatomic Ru3 clusters anchored on ZIF-8 (Ru1 @ZIF-8, Ru3 @ZIF-8). The highly efficient and selective catalysis for semi-hydrogenation of alkyne is observed. The excellent activity derives from high atom-efficiency of atomically dispersed Ru active sites and hydrogen enrichment by the ZIF-8 shell. Meanwhile, ZIF-8 shell serves as a novel molecular sieve for olefins to achieve absolute regioselectivity of catalyzing terminal alkynes but not internal alkynes. Moreover, the size-dependent performance between Ru3 @ZIF-8 and Ru1 @ZIF-8 is detected in experiment and understood by quantum-chemical calculations, demonstrating a new and promising approach to optimize catalysts by controlling the number of atoms.
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