电合成
尿素
电化学
催化作用
法拉第效率
电催化剂
阴极
化学
选择性
化学工程
材料科学
无机化学
纳米技术
电极
物理化学
有机化学
工程类
作者
Weibin Qiu,Shimei Qin,Yibao Li,Ning Cao,Wei‐Rong Cui,Zedong Zhang,Zechao Zhuang,Dingsheng Wang,Yong Zhang
标识
DOI:10.1002/anie.202402684
摘要
Electrocatalytic urea synthesis under ambient conditions offers a promising alternative strategy to the traditional energy-intensive urea industry protocol. Limited by the electrostatic interaction, the reduction reaction of anions at the cathode in the electrocatalytic system is not easily achievable. Here, we propose a novel strategy to overcome electrostatic interaction via pulsed electroreduction. We found that the reconstruction-resistant CuSiOx nanotube, with abundant atomic Cu-O-Si interfacial sites, exhibits ultrastability in the electrosynthesis of urea from nitrate and CO2. Under a pulsed potential approach with optimal operating conditions, the Cu-O-Si interfaces achieve a superior urea production rate (1606.1 μg h-1 mgcat.-1) with high selectivity (79.01%) and stability (the Faradaic efficiency is retained at 80% even after 80 h of testing), outperforming most reported electrocatalytic synthesis urea catalysts. We believe our strategy will incite further investigation into pulsed electroreduction increasing substrate transport, which may guide the design of ambient urea electrosynthesis and other energy conversion systems.
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