sc9b00894_si_001.pdf (1.26 MB)
N,S-Codoped Carbon Shells Embedded with Ultrafine Co NPs for Reductive Amination with Formic Acid
journal contribution
posted on 2019-04-12, 00:00 authored by Haotian Guo, Bowei Wang, Pengzhi Qiu, Ruixiao Gao, Mingming Sun, Ligong ChenHerein,
N,S-codoped carbon materials embedded with ultrafine and
well-distributed Co nanoparticles (1.14 wt % Co) were prepared through
pyrolysis of the hybrids of SNW-1 and Co(Ac)2 coated with
glucose. It was observed by TEM and XRD that Co nanoparticles (NPs)
were entrapped in doped carbon shells uniformly. The glucose coating
presented a significant impact on the size distribution of Co NPs
and doped modes of heteroatoms, especially the S species. The catalyst
displayed outstanding activity for catalytic transfer hydrogenation
(CTH) with formic acid under the base-free system. Encouragingly,
diverse secondary amines were produced in excellent yields through
the domino reaction of hydrogenation and reductive amination. Remarkably,
the catalyst with ultrafine Co NPs showed good durability under harsh
reaction conditions and displayed no significant loss in both activity
and selectivity in 5 runs. This was attributed to the protection of
constructed N,S dual-doped carbon shells. Hence, we offer an alternative
strategy for the construction of dual-doped carbon materials trapped
with ultrafine transition metal, which can be further applied in various
catalytic processes.
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carbon shellsultrafine transition metalCo nanoparticlesSNWsize distributionXRDbase-free systemdual-doped carbon materialsUltrafine Co NPsCo NPsglucose coatingCTHdomino reactionTEMtransfer hydrogenationreductive aminationreaction conditionsS speciesformic acidReductive Aminationultrafine Co NPsalternative strategy
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