催化作用
氨
氨生产
无机化学
电化学
硝酸盐
选择性催化还原
吸附
化学
法拉第效率
氮气
产量(工程)
材料科学
化学工程
电极
物理化学
有机化学
冶金
工程类
作者
Shuo Zhang,Jiang Wu,Mengting Zheng,Jin X,Zihan Shen,Zhonghua Li,Yanjun Wang,Quan Wang,Xuebing Wang,Hui Wei,Jiangwei Zhang,Peng Wang,Shanqing Zhang,Lan Yu,Dong Liang,Qingshan Zhu,Huigang Zhang,Jun Lü
标识
DOI:10.1038/s41467-023-39366-9
摘要
Electrochemical conversion of nitrate to ammonia offers an efficient approach to reducing nitrate pollutants and a potential technology for low-temperature and low-pressure ammonia synthesis. However, the process is limited by multiple competing reactions and NO3- adsorption on cathode surfaces. Here, we report a Fe/Cu diatomic catalyst on holey nitrogen-doped graphene which exhibits high catalytic activities and selectivity for ammonia production. The catalyst enables a maximum ammonia Faradaic efficiency of 92.51% (-0.3 V(RHE)) and a high NH3 yield rate of 1.08 mmol h-1 mg-1 (at - 0.5 V(RHE)). Computational and theoretical analysis reveals that a relatively strong interaction between NO3- and Fe/Cu promotes the adsorption and discharge of NO3- anions. Nitrogen-oxygen bonds are also shown to be weakened due to the existence of hetero-atomic dual sites which lowers the overall reaction barriers. The dual-site and hetero-atom strategy in this work provides a flexible design for further catalyst development and expands the electrocatalytic techniques for nitrate reduction and ammonia synthesis.
科研通智能强力驱动
Strongly Powered by AbleSci AI