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

doi:10.1039/c8ee00133b

CAS OpenIR > 中科院上海应用物理研究所2011-2019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 ; Li, YS ; Wang, GX ; Bao, XH
	2018
Source Publication	ENERGY & ENVIRONMENTAL SCIENCE
ISSN	1754-5692
Volume	11 Issue:5 Pages:1204-1210
Subtype	期刊论文
Abstract	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.
Keyword	X-ray Photoelectron-spectroscopy Electrochemical Co2 Carbon-dioxide Reduction Nanoparticles Graphene Oxygen
DOI	10.1039/c8ee00133b
Indexed By	SCI
Language	英语
WOS ID	WOS:000432599100007
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/28950
Collection	中科院上海应用物理研究所2011-2019年
Affiliation	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 11.Li, YS 12.Wang, GX 13.Bao, XH
Recommended Citation 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.

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