电合成
电催化剂
纳米片
尿素
二氧化碳
催化作用
化学
法拉第效率
无机化学
电化学
有机化学
电极
物理化学
作者
Yue Zhang,Xiaoya Fan,Xun He,Tingyu Yan,Yongchao Yao,Dongdong Zheng,Jingxiang Zhao,Qinghai Cai,Qian Liu,Luming Li,Wei Chu,Shengjun Sun,Xuping Sun
标识
DOI:10.1016/j.cclet.2024.109806
摘要
Electrocatalytic synthesis of urea through C-N bond formation, converting carbon dioxide (CO2) and nitrate (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 0.2 mol/L Na2SO4 solution containing 0.05 mol/L NO3–, the Mo2C/C catalyst achieves an impressive 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 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.
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