Carbon nanotubes with fluorine-rich surface as metal-free electrocatalyst for effective synthesis of urea from nitrate and CO2

Xiaowen Liu ¹Priyank Vijaya Kumar ²Qing Chen³

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作者信息

1. State Key Laboratory of Organic-Inorganic Composites, Center for Soft Matter Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
2. School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
3. Chinese Research Academy of Environment Sciences, Beijing 100012, China
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Abstract

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) g_(cat.)~(-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 C-N coupling reaction to form urea.

Key words

Fluorine-rich surface/Electrocatalytic synthesis of urea/Metal-free catalyst/C-N coupling reaction/High yield rate

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量45

参考文献量38

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