期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 316, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121618
关键词
Fluorine-rich surface; Electrocatalytic synthesis of urea; Metal-free catalyst; C-N coupling reaction; High yield rate
资金
- Fundamental Research Funds for the Central Universities [buctrc202118]
- National Natural Science Foundation of China [52172179]
In this study, carbon nanotubes with fluorine-rich surface were developed as advanced metal-free catalysts for the electrocatalytic synthesis of urea via co-activation of CO2 and NO3-. The formation of *CO and *NH2 intermediates on F-doped C active sites (C-F2 moieties) was found to facilitate the CN coupling reaction for urea formation.
In this work, carbon nanotubes with fluorine-rich surface are firstly developed as advanced metal-free catalysts for the electrocatalytic synthesis of urea via co-activation of CO2 and NO3 - under ambient conditions. A high yield rate of 6.36 mmol h-1 gcat.-1 with a corresponding Faradaic efficiency of 18.0% was achieved for the urea formation at - 0.65 V vs. reversible hydrogen electrode. Density functional theory calculations indicate the formation of *CO and *NH2 intermediates is favorable on F-doped C active sites (C-F2 moieties), facilitating the CN coupling reaction to form urea.
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