催化作用
电化学
杂原子
氨生产
无机化学
氨
硝酸盐
材料科学
兴奋剂
氧化还原
电催化剂
法拉第效率
产量(工程)
亚硝酸盐
化学
化学工程
电极
冶金
有机化学
物理化学
工程类
光电子学
戒指(化学)
作者
Jing Wang,Yian Wang,Chao Cai,Yushen Liu,Duojie Wu,Maoyu Wang,Menghao Li,Xianbin Wei,Minhua Shao,Meng Gu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-02-22
卷期号:23 (5): 1897-1903
被引量:70
标识
DOI:10.1021/acs.nanolett.2c04949
摘要
The electrochemical nitrate reduction reaction (NO3RR) is a promising alternative synthetic route for sustainable ammonia (NH3) production, because it not only eliminates nitrate (NO3-) from water but also produces NH3 under mild operating conditions. However, owing to the complicated eight-electron reaction and the competition from the hydrogen evolution reaction, developing catalysts with high activities and Faradaic efficiencies (FEs) is highly imperative to improve the reaction performance. In this study, Cu-doped Fe3O4 flakes are fabricated and demonstrated to be excellent catalysts for electrochemical conversion of NO3- to NH3, with a maximum FE of ∼100% and an NH3 yield of 179.55 ± 16.37 mg h-1 mgcat-1 at -0.6 V vs RHE. Theoretical calculations reveal that doping the catalyst surface with Cu results in a more thermodynamically facile reaction. These results highlight the feasibility of promoting the NO3RR activity using heteroatom doping strategies.
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