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Coordination of Atomic Co-Pt Coupling Species at Carbon Defects as Active Sites for Oxygen Reduction Reaction
文献类型：期刊论文
| 作者 | Yang, DJ; Liu, HW ; Zhuang, LZ; Hanke, M; Wang, XY; Fischer, JMTA; Zhang, LZ; Yao, XD; Xu W(徐伟); Brown, CL
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| 刊名 | JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
 |
| 出版日期 | 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 |
| 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 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 | 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. |
入库方式： OAI收割
来源：高能物理研究所
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