纳米氧化铜片用于高效电化学还原一氧化氮
Copper oxide nanosheets for efficient electrochemical reduction of nitric oxide
邵加奇 1魏鹏飞 2王硕 2宋延鹏 2付云凡 1李荣坦 2张小敏 2汪国雄 2包信和2
作者信息
- 1. State Key Laboratory of Catalysis,Dalian National Laboratory for Clean Energy,iChEM(Collaborative Innovation Center of Chemistry for Energy Materials),Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China;University of Chinese Academy of Sciences,Beijing 100049,China
- 2. State Key Laboratory of Catalysis,Dalian National Laboratory for Clean Energy,iChEM(Collaborative Innovation Center of Chemistry for Energy Materials),Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China
- 折叠
摘要
一氧化氮电还原反应将工业废气转化为有价值的氨,表现出极具潜力的应用前景.在本工作中,我们合成了具有高比表面积和丰富缺陷的氧化铜纳米片催化剂,在流动池中氨法拉第效率达到92.1％,在-0.2 V vs.RHE时,一氧化氮电还原电流密度和氨的生产速率分别达到1.1 A cm-2和7356 μmol cm-2 h-1.在电流密度超过 400 m A cm-2 时,氨法拉第效率在50小时保持在80％以上.准原位X射线光电子能谱和原位X射线吸收光谱结果表明氧化铜纳米片在一氧化氮电还原过程中被电化学还原成单质铜.与铜纳米颗粒相比,氧化铜纳米片展现出较高的电化学表面积和一氧化氮电还原的内在活性.
Abstract
The removal of nitric oxide(NO)is deemed essential due to its environmental detrimental effects,and electrocatalytic NO reduction reaction(NORR)for ammonia synthesis presents a sustainable approach.In this work,we synthesized copper oxide(CuO)nanosheet catalyst with a high specific surface area and abundant defects.This catalyst ex-hibited a remarkable 92.1％ammonia Faradaic efficiency(FE)in a flow cell,accompanied by a current density of 1.1 A cm-2 and an ammonia production rate of 7356 μmol cm-2 h-1 at-0.26 V vs.reversible hydrogen electrode.The FE of ammonia remained above 80％during stability test for 50 h at a current density of more than 400 mA cm-2.Quasi in situ X-ray pho-toelectron spectroscopy and in situ X-ray absorption spec-troscopy revealed that the CuO nanosheets were electrochemically reduced to monomeric copper during NORR.Compared with Cu nanoparticles,the CuO nanosheets showed a high electrochemical surface area and high intrinsic activity for NORR.
关键词
electrocatalytic NORR/ammonia synthesis/electro-catalysis/CuO nanosheetsKey words
electrocatalytic NORR/ammonia synthesis/electro-catalysis/CuO nanosheets引用本文复制引用
基金项目
National Key R&D Program of China(2023YFA1508002)
National Natural Science Foundation of China(22125205)
National Natural Science Foundation of China(92015302)
Fundamental Research Funds for the Central Universities(20720220008)
Dalian National Laboratory for Clean Energy(DNL201923)
Photon Science Center for Carbon Neutrality()
出版年
2024
NETL
NSTL
万方数据