硝基苯
金属有机骨架
催化作用
脱氢
纳米技术
材料科学
基质(水族馆)
化学工程
化学
纳米颗粒
选择性
组合化学
有机化学
吸附
工程类
地质学
海洋学
作者
Luyan Li,Zhixin Li,Weijie Yang,Yongjun Huang,Gang Huang,Qiaoqiao Guan,Yong Dong,Junling Lu,Shu‐Hong Yu,Hai‐Long Jiang
出处
期刊:Chem
[Elsevier]
日期:2021-03-01
卷期号:7 (3): 686-698
被引量:142
标识
DOI:10.1016/j.chempr.2020.11.023
摘要
Creating free-access active sites and regulating their interaction with substrates are crucial for efficient catalysis, yet remain a grand challenge. Herein, naked Pd nanoparticles (NPs) have been encapsulated in a metal-organic framework (MOF), MIL-101-NH2, to afford [email protected]2. The hydrophobic perfluoroalkyls were post-synthetically modified onto -NH2 group to yield [email protected]x (x = 3, 5, 7, 11, 15), which engineer the MOF pore walls to regulate Pd surrounding microenvironment and interaction with substrates. As a result, both the dehydrogenation coupling of organosilane and hydrogenation of halogenated nitrobenzenes show that their activity and selectivity can be greatly promoted upon hydrophobic modification due to the favorable substrate enrichment and regulated interactions between Pd and the modified MOF hosts, far surpassing the traditional supported or surfactant-protected Pd NPs. We envision metal [email protected] composites would be an ideal platform integrating the inherent activity of well-accessible metal sites with engineered microenvironment via readily tunable MOFs.
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