Ambient electrosynthesis of urea from carbon dioxide and nitrate over Mo2C nanosheet

Yue Zhang ¹Xiaoya Fan ²Xun He ²Tingyu Yan ¹Yongchao Yao ²Dongdong Zheng ²Jingxiang Zhao ¹Qinghai Cai ¹Qian Liu ³Luming Li ³Wei Chu ³Shengjun Sun ⁴Xuping Sun⁵

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作者信息

1. College of Chemistry and Chemical Engineering,and Key Laboratory of Photonic and Electronic Bandgap Materials,Ministry of Education,Harbin Normal University,Harbin 150025,China
2. Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,China
3. Institute for Advanced Study,Chengdu University,Chengdu 610106 China
4. College of Chemistry,Chemical Engineering and Materials Science,Shandong Normal University,Jinan 250014,China
5. Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,China;College of Chemistry,Chemical Engineering and Materials Science,Shandong Normal University,Jinan 250014,China
折叠

Abstract

Electrocatalytic synthesis of urea through C-N bond formation,converting carbon dioxide(CO2)and ni-trate(NO3-),presents a promising,less energy-intensive alternative to industrial urea production process.In this communication,we report the application of Mo2C nanosheets-decorated carbon sheets(Mo2C/C)as a highly efficient electrocatalyst for facilitating C-N coupling in ambient urea electrosynthesis.In CO2-saturated 0.2mol/L Na2SO4 solution containing 0.05mol/L NO3-,the Mo2C/C catalyst achieves an impres-sive urea yield of 579.13 μg h-1 mg-1 with high Faradaic efficiency of 44.80％at-0.5 V versus the reversible hydrogen electrode.Further theoretical calculations reveal that the multiple Mo active sites enhance the formation of*CO and*NH2 intermediates and facilitate their C-N coupling.This research propels the use of Mo2C-based electrodes in electrocatalysis and accentuates the capabilities of binary metal-based catalysts in C-N coupling reactions.

Key words

Mo2C/Multiple active sites/C-N coupling/Electrocatalysis/Urea synthesis/Density functional theory calculation

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出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCDCSCD

影响因子：0.771

ISSN：1001-8417

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