Fe‐Doped CoS<sub>2</sub> Nanoarrays: Efficient Electrocatalytic Nitrate Reduction to Ammonia under Ambient Conditions
Xiaoliang Lü, Jinzhi Zhou, Jinxiu Zhao, Dan Wu, Xuejing Liu, Xiang Ren, Qin Wei, Huangxian Ju
Abstract
Abstract The electrocatalytic nitrate reduction reaction (NO 3 − RR) enables the reduction of nitrate to ammonium ions under ambient conditions. It was considered as an alternative reaction for the production of ammonia (NH 3 ) in recent years. In this paper, we report that the Fe doping CoS 2 nanoarrays can effectively catalyze the formation of NH 3 from nitrate (NO 3 − ) under ambient conditions. This is mainly due to the increase of the NO 3 − reaction active site by Fe doping and the porous nanostructure of the catalyst, which greatly improves the catalytic activity. Specifically, at −0.9 V vs. RHE, the NH 3 yield rate (R NH3 ) of Fe−CoS 2 /CC is 17.8×10 −2 mmol h −1 cm −2 with Faraday Efficiency (FE) of 88.93 %. Besides, such catalyst shows good durability and catalytic stability, which provides the possibility for the future application of electrocatalytic NH 3 production.