期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 27, 期 8, 页码 2707-2716出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202003640
关键词
alkenes; hydrogenation; metal-organic frameworks; nanoalloys; nitroarenes
资金
- National Natural Science Foundation of China [11972195, 11702141]
This work successfully prepared CoPd nanoalloy catalysts with excellent activity and stability, showing a synergistic effect in hydrogenation reactions. Constructed on a ZIF-67 template, the catalyst with a mesoporous SiO2 layer effectively prevented sintering of carbon and metal nanoparticles at high temperatures, enhancing catalytic performance.
In this work, a series of metal-organic framework (MOF)-derived CoPd nanoalloys have been prepared. The nanocatalysts exhibited excellent activities in the hydrogenation of nitroarenes and alkenes in green solvent (ethanol/water) under mild conditions (H-2 balloon, room temperature). Using ZIF-67 as template for both carbon matrix and cobalt precursor coating with a mesoporous SiO2 layer, the catalyst CoPd/NC@SiO2 was smoothly constructed. Catalytic results revealed a synergistic effect between Co and Pd components in the hydrogenation process due to the enhanced electron density. The mesoporous SiO2 shell effectively prevented the sintering of hollow carbon and metal NPs at high temperature, furnishing the well-dispersed nanoalloy catalysts and better catalytic performance. Moreover, the catalyst was durable and showed negligible activity decay in recycling and scale-up experiments, providing a mild and highly efficient way to access amines and arenes.
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