Zif-derived Co@hollow carbon nanofibers boost CO2 chemical fixation

被引:0
|
作者
Qu, Zhengyan [1 ]
Wang, Yingfan [1 ]
Zhou, Minghui [1 ]
Zhang, Jiuxuan [1 ]
Jiang, Hong [1 ]
Du, Yan [2 ]
Tang, Zhenchen [1 ,3 ]
Chen, Rizhi [1 ,3 ]
机构
[1] Nanjing Tech Univ, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Peoples R China
[2] Nanjing Tech Univ, Sch Environm Sci & Engn, Nanjing 211816, Peoples R China
[3] Suzhou Lab, Suzhou 215000, Peoples R China
关键词
CO2; Cycloaddition; Hollow carbon nanofibers; Electrospinning; ZIFs; POROUS CARBON; CATALYST; NITRIDE; FIBERS; SITES;
D O I
10.1016/j.seppur.2024.127561
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In pursuit of carbon neutrality, the development of highly efficient catalysts for the CO2 cycloaddition with epoxides represents a prominent approach of utilizing CO2 to produce valuable cyclic carbonates. Herein, Co@hollow carbon nanofibers (Co@HCNFs) catalysts with multi-level pore structures were fabricated by coaxial electrospinning, in-situ growth of zeolitic imidazolate framework-67 (ZIF-67) and subsequent high temperature pyrolysis. The hollow structure and the formation of the active sites of Co@N-doped carbon (Co@CN) were regulated by changing the feeding ratio of core to shell and the Co(NO3)(2)center dot 6H(2)O concentration during the ZIF-67 growth, thereby fine-tuning the catalyst structures and its catalytic performance. The as-prepared Co@HCNFs-0.6-0.1 catalyst exhibits superior catalytic performance in the CO2 cycloaddition and epichlorohydrin without a co-catalyst, achieving superior specific activity of 838 mmol.min(-1).g(-1). The outstanding catalytic performance is attributed to its multi-level pore structures with rich N content and well-distributed Co@CN nanoparticles. Moreover, Co@HCNFs-0.6-0.1 exhibits good stability over ten reaction cycles.
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页数:12
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