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Ball-Milled Co–N–C Nanocomposite for Benzylic C–H Bond Oxidation: a Facile, Practical, and Recyclable Catalyst under Neat Conditions and Atmospheric Pressure Oxygen
journal contribution
posted on 2018-11-12, 00:00 authored by Shoujie Nie, Jun Wang, Xiang Huang, Xiyu Niu, Li Zhu, Xiaoquan YaoA novel
Co–N–C nanocomposite catalyst was prepared
using a mechanical ball-milling method from melamine and Co(NO3)2, and no high-temperature calcination procedures
were required. The superior nanocomposite catalyst shows excellent
catalytic activity in the selective liquid-phase oxidation of benzylic
C–H bonds with atmospheric pressure oxygen as an oxidant under
solvent-free conditions. With 0.5 mol % of the Co–N–C
nanocomposite catalyst, up to a 95% conversion and 98% selectivity
are achieved in the oxidation of ethylbenzene to acetophenone. Furthermore,
the catalyst shows good recyclability and can be simply recovered
by filtration and reused several times without a significant loss
in catalytic activity.