Turning Carbon Atoms into Highly Active Oxygen Reduction Reaction Electrocatalytic Sites in Nitrogen-Doped Graphene-Coated Co@Ag

doi:10.1021/acssuschemeng.8b02573

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院强磁场科学中心

	Turning Carbon Atoms into Highly Active Oxygen Reduction Reaction Electrocatalytic Sites in Nitrogen-Doped Graphene-Coated Co@Ag
	Li, Mengsi 1,2; Wang, Changlai 1,2; Yang, Yang 1,2; Jiang, Peng 1,2; Lin, Zhiyu 1,2; Xia, Guoliang 1,2; Yang, Kang 1,2; Xu, Pengping 1,2; Chen, Qianwang 1,2,3
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2018-11-05
卷号	6 期号:11 页码:14033-14041
关键词	Metal-organic frameworks Oxygen reduction reaction Electron transfer Co core/Ag mantle structure Tuning electronic structure
ISSN号	2168-0485
DOI	10.1021/acssuschemeng.8b02573
通讯作者	Chen, Qianwang(cqw@ustc.edu.cn)
英文摘要	In recent years, 3d transition metals or alloys encapsulated by graphene layers (M@NG) have been emerging as prospective electrocatalysts especially for hydrogen evolution reactions (HERs) and oxygen evolution reactions (OERs). However, this strategy is limited in preparation of high-performance oxygen reduction reaction (ORR) catalysts. Herein we prepared Co@Ag bimetallic nanoparticles embedded in nitrogen rich graphene layers via pyrolysis metal organic frameworks (MOFs). The catalyst displays extraordinarily high ORR performance with a high onset potential of 0.989 V and a half-wave potential of 0.872 V in 0.1 M KOH. Moreover, it shows a superb long-term stability performance after 5000 cycles on account of the carbon layers that protect the material from corrosion as well as high methyl alcohol tolerance under methanol environments. Density functional theory calculations suggest that carbon atoms, which are adjacent to nitrogen dopants in Co@Ag@NC, are active sites for ORR Especially, Ag "mantle" in Co@Ag@NC contributes a great deal to tuning of electronic structure of carbon active sites, thereby promoting the activity of carbon atoms and enhancing ORR kinetics. This unique Co core/Ag mantle structure can boost the overall ORR activity of M@NG while keeping cost-effectiveness due to the very low requirement of Ag content, providing a new insight into design of other efficient electrocatalysts.
资助项目	National Natural Science Foundation (NSFC)[21271163] ; National Natural Science Foundation (NSFC)[U1232211] ; National Natural Science Foundation (NSFC)[21571168] ; Fundamental Research Funds for the Central Universities[WK2060140021] ; CAS/SAFEA International Partnership Program for Creative Research Teams ; Hefei Science Center CAS[2016HSC-IU011]
WOS关键词	HYDROGEN EVOLUTION REACTION ; REACTION CATALYST ; ALLOY CATALYSTS ; NANOPARTICLES ; STRAIN ; COBALT ; PD ; NANOCRYSTALS ; SPECTROSCOPY ; ENERGY
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000449577200048
资助机构	National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; National Natural Science Foundation (NSFC) ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; 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内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/34241]
专题	合肥物质科学研究院_中科院强磁场科学中心
通讯作者	Chen, Qianwang
作者单位	1.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Mat Sci & Engn, 96 JinZhai Rd, Hefei 230026, Anhui, Peoples R China 2.Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nanosci & Technol, 96 JinZhai Rd, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Hefei Inst Phys Sci, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Li, Mengsi,Wang, Changlai,Yang, Yang,et al. Turning Carbon Atoms into Highly Active Oxygen Reduction Reaction Electrocatalytic Sites in Nitrogen-Doped Graphene-Coated Co@Ag[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2018,6(11):14033-14041.
APA	Li, Mengsi.,Wang, Changlai.,Yang, Yang.,Jiang, Peng.,Lin, Zhiyu.,...&Chen, Qianwang.(2018).Turning Carbon Atoms into Highly Active Oxygen Reduction Reaction Electrocatalytic Sites in Nitrogen-Doped Graphene-Coated Co@Ag.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,6(11),14033-14041.
MLA	Li, Mengsi,et al."Turning Carbon Atoms into Highly Active Oxygen Reduction Reaction Electrocatalytic Sites in Nitrogen-Doped Graphene-Coated Co@Ag".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 6.11(2018):14033-14041.