Coordination of Atomic Co-Pt Coupling Species at Carbon Defects as Active Sites for Oxygen Reduction Reaction

doi:10.1021/jacs.8b04647

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	Coordination of Atomic Co-Pt Coupling Species at Carbon Defects as Active Sites for Oxygen Reduction Reaction
	Yang, DJ; Liu, HW; Zhuang, LZ; Hanke, M; Wang, XY; Fischer, JMTA; Zhang, LZ; Yao, XD; Xu W(徐伟); Brown, CL
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2018
卷号	140 期号:34 页码:10757-10763
ISSN号	0002-7863
DOI	10.1021/jacs.8b04647
文献子类	Article
英文摘要	Platinum (Pt) is the state-of-the-art catalyst for oxygen reduction reaction (ORR), but its high cost and scarcity limit its large-scale use. However, if the usage of Pt reduces to a sufficiently low level, this critical barrier may be overcome. Atomically dispersed metal catalysts with high activity and high atom efficiency have the possibility to achieve this goal. Herein, we report a locally distributed atomic Pt-Co nitrogen carbon-based catalyst (denoted as A-CoPt-NC) with high activity and robust durability for ORR (267 times higher than commercial Pt/C in mass activity). The A-CoPt-NC shows a high selectivity for the 4e(-) pathway in ORR, differing from the reported 2e(-) pathway characteristic of atomic Pt catalysts. Density functional theory calculations suggest that this high activity originates from the synergistic effect of atomic Pt-Co located on a defected C/N graphene surface. The mechanism is thought to arise from asymmetry in the electron distribution around the Pt/Co metal centers, as well as the metal atoms' coordination with local environments on the carbon surface. This coordination results from N8V4 vacancies (where N8 represents the number of nitrogen atoms and V4 indicates the number of vacant carbon atoms) within the carbon shell, which enhances the oxygen reduction reaction via the so-called synergistic effect.
WOS关键词	SINGLE-ATOM ; ELECTROCHEMICAL REACTIONS ; HYDROGEN EVOLUTION ; CATALYST ; OXIDATION ; GRAPHENE ; IDENTIFICATION ; PERFORMANCE ; EFFICIENT ; SURFACE
WOS研究方向	Chemistry
语种	英语
WOS记录号	WOS:000443654400023
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286287]
专题	中国科学院高能物理研究所_科研计划处高能物理研究所_理论物理室高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Yang, DJ,Liu, HW,Zhuang, LZ,et al. Coordination of Atomic Co-Pt Coupling Species at Carbon Defects as Active Sites for Oxygen Reduction Reaction[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2018,140(34):10757-10763.
APA	Yang, DJ.,Liu, HW.,Zhuang, LZ.,Hanke, M.,Wang, XY.,...&Chen, J.(2018).Coordination of Atomic Co-Pt Coupling Species at Carbon Defects as Active Sites for Oxygen Reduction Reaction.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,140(34),10757-10763.
MLA	Yang, DJ,et al."Coordination of Atomic Co-Pt Coupling Species at Carbon Defects as Active Sites for Oxygen Reduction Reaction".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 140.34(2018):10757-10763.