电催化剂
法拉第效率
氨生产
亚硝酸盐
氨
电解质
阴极
化学
析氧
化学工程
无机化学
电化学
电极
有机化学
硝酸盐
物理化学
工程类
作者
Luocai Yi,Ping Shao,Hao Li,Mengtian Zhang,Xinxin Peng,Kai Chen,Xi Liu,Zhenhai Wen
标识
DOI:10.1016/j.jpowsour.2023.232668
摘要
Ammonia is a vital chemical raw material for both industry and agriculture, the current ammonia synthesis process is based on the Haber-Bosch process yet faces issues of high-energy consumption and high CO2 emission. Electrochemical nitrite reduction reaction (NO2−RR) has been considered as one of the alternative paths for ammonia synthesis. Here, we develop a large-scale viable route for synthesis of 2H–MoS2 nanosheets (MoS2 NSs), which show high activity as electrocatalyst for high-efficiency conversion of NO2−RR to ammonia, the yields of NH3 production rate reaches as high as 8.99 mg cm−2 h−1 with a faradaic efficiency of 93.52%. A hybrid electrolytic cell is constructed by coupling MoS2 NSs as NO2−RR cathode in neutral electrolyte with oxygen evolution reaction (OER) in alkaline solution, which can operate stably for more than 120 h with the capability of continuously producing ammonia at the production rate of 38.79 mg cm−2 h−1.
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