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通过钴/锌-沸石咪唑酯骨架材料可控合成具有高密度钴-氮活性位点的钴/氮碳催化剂用于环丙烷化反应。

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

作者信息

Yue Xin, Li Jiangwei, Li Chunying, Wang Zhixuan, Du Yongmei, Sun Daoan, Ma Hui, Lu Jian

机构信息

State Key Laboratory of Fluorine & Nitrogen Chemical, Xi'an Modern Chemistry Research Institute Xi'an 710065 China.

出版信息

RSC Adv. 2024 Dec 17;14(53):39740-39746. doi: 10.1039/d4ra01816h. eCollection 2024 Dec 10.

DOI:10.1039/d4ra01816h
PMID:39691230
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11651007/
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 active sites could be modified by adjusting the Co/Zn molar ratio of the ZIF precursor. The generation of Co-N could be attributed to the evaporation of Zn species, which provides rich micropores.

摘要

通过简单地对自制的Co/Zn-ZIF（沸石咪唑酯骨架）进行热解制备了新型Co/NC非均相催化剂。采用XRD、XPS、拉曼光谱、TEM和BET对样品进行了表征，并成功应用于环丙烷化反应，产率为85%。此外，这种一锅法合成的催化剂可以循环使用多次而无明显失活。通过调节ZIF前驱体的Co/Zn摩尔比可以改变Co-N活性位点的含量。Co-N的生成可归因于Zn物种的蒸发，这提供了丰富的微孔。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc65/11651007/b14807c5383b/d4ra01816h-s3.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cc65/11651007/b14807c5383b/d4ra01816h-s3.jpg

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