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

文献类型：期刊论文

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作者Sun, T.; Zhao, S.; Chen, W.; Zhai, D.; Dong, J.; Wang, Y.; Zhang, S.; Han, A.; Gu, L.; Yu, R.
刊名PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA ; PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
出版日期2018 ; 2018
卷号115期号:50页码:12692-12697
关键词single-atomic cobalt sites single-atomic cobalt sites oxygen reduction reaction hydrogen evolution reaction in situ XAS measurements hierarchically ordered porous structure oxygen reduction reaction hydrogen evolution reaction in situ XAS measurements hierarchically ordered porous structure
ISSN号0027-8424 ; 0027-8424
DOI10.1073/pnas.1813605115 ; 10.1073/pnas.1813605115
文献子类Article ; 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.; 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 ; OXYGEN REDUCTION REACTION ; METAL-ORGANIC FRAMEWORK ; HYDROGEN EVOLUTION ; GENERAL-SYNTHESIS ; CATALYTIC SITES ; OXIDATION ; GRAPHENE ; IDENTIFICATION ; ARRAYS ; FOAM ; METAL-ORGANIC FRAMEWORK ; HYDROGEN EVOLUTION ; GENERAL-SYNTHESIS ; CATALYTIC SITES ; OXIDATION ; GRAPHENE ; IDENTIFICATION ; ARRAYS ; FOAM
WOS研究方向Science & Technology - Other Topics ; Science & Technology - Other Topics
语种英语 ; 英语
WOS记录号WOS:000452866000062 ; WOS:000452866000062
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
高能物理研究所_管理与技术支持
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		 Sun, T.,Zhao, S.,Chen, W.,et al. Single-atomic cobalt sites embedded in hierarchically ordered porous nitrogen-doped carbon as a superior bifunctional electrocatalyst, 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, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018, 2018,115, 115(50):12692-12697, 12692-12697.
APA Sun, T..,Zhao, S..,Chen, W..,Zhai, D..,Dong, J..,...&董俊才.(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 Sun, T.,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.

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来源：高能物理研究所

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