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Controllable synthesis of Co/NC catalysts with high-density Co-N <sub><i>x</i></sub> active sites derived from Co/Zn-ZIF for cyclopropanation.

ABSTRACT: Novel Co/NC heterogeneous catalysts were prepared by simply employing self-made Co/Zn-ZIF (zeolitic imidazolate framework) through pyrolysis. The samples were characterized by XRD, XPS, Raman, TEM and BET, and were successfully applied in a cyclopropanation reaction with a yield of 85%. Furthermore, this one-pot synthesized catalyst could be recycled several times without apparent deactivation. The content of Co-N x active sites could be modified by adjusting the Co/Zn molar ratio of the ZIF precursor. The generation of Co-N x could be attributed to the evaporation of Zn species, which provides rich micropores.

SUBMITTER: Yue X 

PROVIDER: S-EPMC11651007 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature

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Controllable synthesis of Co/NC catalysts with high-density Co-N <sub><i>x</i></sub> active sites derived from Co/Zn-ZIF for cyclopropanation.

Yue Xin X   Li Jiangwei J   Li Chunying C   Wang Zhixuan Z   Du Yongmei Y   Sun Daoan D   Ma Hui H   Lu Jian J  

RSC advances 20241217 53

Novel Co/NC heterogeneous catalysts were prepared by simply employing self-made Co/Zn-ZIF (zeolitic imidazolate framework) through pyrolysis. The samples were characterized by XRD, XPS, Raman, TEM and BET, and were successfully applied in a cyclopropanation reaction with a yield of 85%. Furthermore, this one-pot synthesized catalyst could be recycled several times without apparent deactivation. The content of Co-N <sub><i>x</i></sub> active sites could be modified by adjusting the Co/Zn molar ra  ...[more]

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