尿素
催化作用
法拉第效率
材料科学
产量(工程)
硝酸盐
电化学
电合成
无机化学
化学
电极
物理化学
有机化学
冶金
作者
Ying Zhang,Zhuohang Li,Chaofan Qiang,Kai Chen,Yali Guo,Ke Chu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-08-26
标识
DOI:10.1021/acsnano.4c09141
摘要
Urea electrosynthesis from coelectrolysis of NO3– and CO2 (UENC) holds a significant prospect to achieve efficient and sustainable urea production. Herein, atomically dispersed Cu on In2O3 (Cu1/In2O3) is designed as an effective and robust catalyst for the UENC. Combined theoretical calculations and in situ spectroscopic analysis reveal the synergistic effect of the Cu1–O2–In site and the In site to boost the UENC energetics via a relay catalysis pathway, where the Cu1–O2–In site drives *NO3 → *NH2 and the In site catalyzes *CO2 → *CO. The generated *CO is then migrated from the In site to the Cu1–O2–In site, followed by C–N coupling with *NH2 on the Cu1–O2–In site to generate urea. Consequently, Cu1/In2O3 assembled within a flow cell exhibits an impressive urea yield rate of 28.97 mmol h–1 g–1 with a urea-Faradaic efficiency (FEurea) of 50.88%.
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