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Metal–Organic Framework‐Encapsulated CoCu Nanoparticles for the Selective Transfer Hydrogenation of Nitrobenzaldehydes: Engineering Active Armor by the Half‐Way Injection Method
Author(s) -
Li Yang,
Li Yug,
Zheng Jianwei,
Dong Xiaoyun,
Guo Rongxiu,
Wang Yiming,
Hu Zenan,
Ai Yongjian,
Liang Qionglin,
Sun Hongbin
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202003857
Subject(s) - materials science , catalysis , nanoparticle , selectivity , composite number , metal organic framework , transfer hydrogenation , chemical engineering , hydrogen , nanotechnology , composite material , organic chemistry , chemistry , ruthenium , adsorption , engineering
A novel armor‐type composite of metal–organic framework (MOF)‐encapsulated CoCu nanoparticles with a Fe 3 O 4 core (Fe 3 O 4 @SiO 2 ‐NH 2 ‐CoCu@UiO‐66) has been designed and synthesized by the half‐way injection method, which successfully serves as an efficient and recyclable catalyst for the selective transfer hydrogenation. In this half‐way injection approach, the pre‐synthetic Fe 3 O 4 @SiO 2 ‐NH 2 ‐CoCu was injected into the UiO‐66 precursor solution halfway through the MOF budding period. The formed MOF armor could play a role of providing significant additional catalytic sites besides CoCu nanoparticles, protecting CoCu nanoparticles, and improving the catalyst stability, thus facilitating the selective transfer hydrogenation of nitrobenzaldehydes into corresponding nitrobenzyl alcohols in high selectivity (99 %) and conversion (99 %) rather than nitro group reduction products. Notably, this method achieves the precise assembly of a MOF‐encapsulated composite, and the ingenious combination of MOF and nanoparticles exhibits excellent catalytic performance in the selective hydrogen transfer reaction, implementing a “1+1>2” strategy in catalysis.