电催化剂
氨
碳纳米管
材料科学
兴奋剂
无机化学
硝酸盐
氨生产
碳纤维
氧还原反应
化学
纳米技术
电化学
电极
有机化学
复合数
光电子学
物理化学
复合材料
作者
Xianxian He,Hongfei Liu,Jiangzhou Qin,Zhaodong Niu,Jincheng Mu,Baojun Liu
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:52 (31): 10869-10875
被引量:2
摘要
The electrochemical reduction of nitrate (NO3-) to ammonia (NH3) has emerged as an attractive approach for selectively reducing NO3- to highly value-added NH3 and removing NO3- pollutants simultaneously. In this work, a heterostructured Co/Co3O4 electrocatalyst anchored on N-doped carbon nanotubes was prepared and applied for the NO3- reduction towards NH3 under alkaline conditions. The catalyst achieves outstanding performance with up to 67% NH3 faradaic efficiency at -1.2 V vs. Hg/HgO and 8.319 mg h-1 mgcat-1 yield at -1.7 V vs. Hg/HgO. In addition, it also exhibits good long-term stability. 15N isotopic labelling experiments prove that the yielded NH3 is derived from NO3- species. In situ electrochemical Raman spectra revealed that the structure of the as-prepared catalyst showed outstanding stability and identified possible intermediates during the electrocatalytic NO3- reduction reaction (NO3RR).
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