Journal
NEW JOURNAL OF CHEMISTRY
Volume 46, Issue 20, Pages 9727-9734Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nj01495e
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Funding
- Specialized Research Funds for the National Natural Science Foundation of China [22078242, U20A20153]
- Innovative Research Group Project of the National Natural Science Foundation of China [22121004]
- Haihe Laboratory of Sustainable Chemical Transformations [CYZC202107]
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Heteroatom-doped carbon-based materials, such as nitrogen-doped 3D hollow carbon spheres (N-HCSs), show great potential as metal-free catalysts for selective oxidation of C-H bonds. The catalytic performance of N-HCSs is influenced by deposition temperature, nitrogen content, and pore structure. Higher mesopore abundance and moderate graphite nitrogen content enhance the catalytic activity of N-HCSs.
Heteroatom-doped carbon-based materials are considered to be efficient metal-free catalysts for diverse organic synthetic reactions. However, compared with metal-based catalysts, there are still gaps in the catalytic performance of metal-free catalysts in the selective catalytic oxidation of C-H bonds. Herein, nitrogen-doped 3D hollow carbon spheres (N-HCSs) were prepared by the chemical vapor deposition (CVD) method. And the effects of deposition temperature, nitrogen content and pore structure on the catalytic performance are systematically investigated. For the model oxidation reaction of ethylbenzene, the obtained catalyst shows 98.4% conversion of ethylbenzene and 99.5% selectivity of acetophenone at 50 degrees C. The abundant mesopores and modest graphite nitrogen content are confirmed to be beneficial for improving their catalytic activity in the selective oxidation of C-H bonds.
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