Single-atomic cobalt sites embedded in hierarchically ordered porous nitrogen-doped carbon as a superior bifunctional electrocatalyst

doi:10.1073/pnas.1813605115

	Single-atomic cobalt sites embedded in hierarchically ordered porous nitrogen-doped carbon as a superior bifunctional electrocatalyst
	Dong JC(董俊才); Sun, T.; Zhao, S.; Chen, W.; Zhai, D.; Dong, J.; Wang, Y.; Zhang, S.; Han, A.; Gu, L.
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2018
卷号	115 期号:50 页码:12692-12697
关键词	single-atomic cobalt sites oxygen reduction reaction hydrogen evolution reaction in situ XAS measurements hierarchically ordered porous structure
ISSN号	0027-8424
DOI	10.1073/pnas.1813605115
文献子类	Article
英文摘要	Exploring efficient and cost-effective catalysts to replace precious metal catalysts, such as Pt, for electrocatalytic oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) holds great promise for renewable energy technologies. Herein, we prepare a type of Co catalyst with single-atomic Co sites embedded in hierarchically ordered porous N-doped carbon (Co-SAS/HOPNC) through a facile dual-template cooperative pyrolysis approach. The desirable combination of highly dispersed isolated atomic Co-N-4 active sites, large surface area, high porosity, and good conductivity gives rise to an excellent catalytic performance. The catalyst exhibits outstanding performance for ORR in alkaline medium with a half-wave potential (E-1/2) of 0.892 V, which is 53 mV more positive than that of Pt/C, as well as a high tolerance of methanol and great stability. The catalyst also shows a remarkable catalytic performance for HER with distinctly high turnover frequencies of 0.41 and 3.8 s(-1) at an overpotential of 100 and 200 mV, respectively, together with a long-term durability in acidic condition. Experiments and density functional theory (DFT) calculations reveal that the atomically isolated single Co sites and the structural advantages of the unique 3D hierarchical porous architecture synergistically contribute to the high catalytic activity.
WOS关键词	OXYGEN REDUCTION REACTION ; METAL-ORGANIC FRAMEWORK ; HYDROGEN EVOLUTION ; GENERAL-SYNTHESIS ; CATALYTIC SITES ; OXIDATION ; GRAPHENE ; IDENTIFICATION ; ARRAYS ; FOAM
WOS研究方向	Science & Technology - Other Topics
语种	英语
WOS记录号	WOS:000452866000062
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286892]
专题	高能物理研究所_多学科研究中心高能物理研究所_实验物理中心高能物理研究所_加速器中心高能物理研究所_粒子天体物理中心
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	Dong JC,Sun, T.,Zhao, S.,et al. Single-atomic cobalt sites embedded in hierarchically ordered porous nitrogen-doped carbon as a superior bifunctional electrocatalyst[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(50):12692-12697.
APA	董俊才.,Sun, T..,Zhao, S..,Chen, W..,Zhai, D..,...&Li, Y..(2018).Single-atomic cobalt sites embedded in hierarchically ordered porous nitrogen-doped carbon as a superior bifunctional electrocatalyst.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(50),12692-12697.
MLA	董俊才,et al."Single-atomic cobalt sites embedded in hierarchically ordered porous nitrogen-doped carbon as a superior bifunctional electrocatalyst".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.50(2018):12692-12697.