Coordinatively unsaturated nickel-nitrogen sites towards selective and high-rate CO2 electroreduction

doi:10.1039/c8ee00133b

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Coordinatively unsaturated nickel-nitrogen sites towards selective and high-rate CO2 electroreduction
	Yan, CC ; Li, HB ; Ye, YF ; Wu, HH ; Cai, F ; Si, R ; Xiao, JP ; Miao, S ; Xie, SH ; Yang, F
刊名	ENERGY & ENVIRONMENTAL SCIENCE
	2018
卷号	11 期号:5 页码:1204-1210
关键词	X-ray Photoelectron-spectroscopy Electrochemical Co2 Carbon-dioxide Reduction Nanoparticles Graphene Oxygen
ISSN号	1754-5692
DOI	10.1039/c8ee00133b
文献子类	期刊论文
英文摘要	High Faradaic efficiency and appreciable current density are essential for future applications of the electrochemical CO2 reduction reaction (CO2RR). However, these goals are difficult to achieve simultaneously due to the severe side reaction - the hydrogen evolution reaction (HER). Herein, we successfully synthesized coordinatively unsaturated nickel-nitrogen (Ni-N) sites doped within porous carbon with a nickel loading as high as 5.44 wt% by pyrolysis of Zn/Ni bimetallic zeolitic imidazolate framework-8. Over the Ni-N composite catalysts, the CO current density increases with the overpotential and reaches 71.5 +/- 2.9 mA cm(-2) at -1.03 V (vs. a reversible hydrogen electrode, RHE), while maintaining a high CO Faradaic efficiency of 92.0-98.0% over a wide potential range of -0.53 to -1.03 V (vs. the RHE). Density functional theory calculations suggest that the CO2RR occurs more easily than the HER over the coordinatively unsaturated Ni-N site. Therefore, highly doped and coordinatively unsaturated Ni-N sites achieve high current density and Faradaic efficiency of the CO2RR simultaneously, breaking current limits in metal-nitrogen composite catalysts.
语种	英语
WOS记录号	WOS:000432599100007
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/28950]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Yan, CC 2.Li, HB 3.Ye, YF 4.Wu, HH 5.Cai, F 6.Si, R 7.Xiao, JP 8.Miao, S 9.Xie, SH 10.Yang, F
推荐引用方式 GB/T 7714	Yan, CC,Li, HB,Ye, YF,et al. Coordinatively unsaturated nickel-nitrogen sites towards selective and high-rate CO2 electroreduction[J]. ENERGY & ENVIRONMENTAL SCIENCE,2018,11(5):1204-1210.
APA	Yan, CC.,Li, HB.,Ye, YF.,Wu, HH.,Cai, F.,...&Bao, XH.(2018).Coordinatively unsaturated nickel-nitrogen sites towards selective and high-rate CO2 electroreduction.ENERGY & ENVIRONMENTAL SCIENCE,11(5),1204-1210.
MLA	Yan, CC,et al."Coordinatively unsaturated nickel-nitrogen sites towards selective and high-rate CO2 electroreduction".ENERGY & ENVIRONMENTAL SCIENCE 11.5(2018):1204-1210.