聚乙二醇
路易斯酸
化学
催化作用
电化学
纳米棒
PEG比率
法拉第效率
选择性
电解质
水溶液
氨生产
电催化剂
吸附
氨
无机化学
氮气
化学工程
电极
材料科学
纳米技术
有机化学
物理化学
经济
财务
工程类
作者
Haifan Wang,Menglei Yuan,Jingxian Zhang,Yiling Bai,Ke Zhang,Bin Li,Guangjin Zhang
标识
DOI:10.1016/j.jcis.2023.06.097
摘要
Ammonia (NH3) synthesis at mild conditions by electrocatalytic nitrogen reduction (eNRR) has received more attention and has been regarded as a promising alternative to the traditional Haber–Bosch process. Lewis acid-base pairs (LPs) can chemisorb and react with nitrogen by electronic interaction, while the tuning of the microenvironment near electrode can hinder hydrogen evolution reaction (HER) thus improving the selectivity of the eNRR. Herein, the FeOOH nanorod coupled with LPs on the surface (i.e., Fe, Fe–O) was synthesized, which could effectively drive eNRR. Meanwhile, polyethylene glycol (PEG) was introduced to serve as a local non-aqueous electrolyte system to inhibit HER. The prepared FeOOH-150 catalyst achieved outstanding eNRR performance with an NH3 yield rate of 118.07 μg h−1mgcat−1 and a Faradaic efficiency of 51.4 % at −0.6 V vs. RHE in 0.1 M LiClO4 + 20 % PEG. Both the experiment and DFT calculations revealed that the interaction of PEG with Lewis base sites could optimize nitrogen adsorption configuration and activation.
科研通智能强力驱动
Strongly Powered by AbleSci AI