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Meta-Organic-Framework-Derived Fe-N/C Electrocatalyst with Five-Coordinated Fe-N-x), Sites for Advanced Oxygen Reduction in Acid Media
文献类型：期刊论文
| 作者 | Zheng LR(郑黎荣) ; Chen, JH; Zhao, JX; He, JP; Liang, YY; Zheng, LR; Lai, QX
|
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2017 |
| 卷号 | 7期号:3页码:1655-1663 |
| 关键词 | host guest chemistry confinement effect Fe-N-x sites five-coordinated configuration oxygen reduction electrocatalytic mechanism |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.6b02966 |
| 文献子类 | Article |
| 英文摘要 | Even though Fe-N/C electrocatalysts with abundant Fe-N-x active sites have been developed as one of the most promising alternatives to precious metal materials for oxygen reduction reaction (ORR), further improvement of their performance requires precise control over Fe-N-x sites at the molecular level and deep understanding of the catalytic mechanism associated with each particular structure. Herein, we report a host guest chemistry strategy to construct Fe-mIm nanocluster (NC) (guest)@zeolite imidazole framework 8 (ZIF-8) (host) precursors that can be transformed into Fe-N/C electrocatalysts with controllable structures. The ZIF-8 host network exhibits a significant host guest relationship dependent confinement effect for the pyrolysis process, resulting in different types of Fe-Nx sites with two- to five-coordinated configurations on the porous carbon matrix confirmed by X-ray absorption near edge structure ()CANES) and Fourier transform (FT) extended X-ray absorption fine structure (EXAFS) spectra. Electrochemical tests reveal that the five-coordinated Fe-N-x sites can significantly promote the reaction rate in acid media, due to the small ORR energy barrier and the low adsorption energy of intermediate OH on these sites suggested by density functional theory (DFT) calculations. Such a synthesis strategy provides an effective route to realize the controllable construction of highly active sites for ORR at the molecular level. |
| WOS关键词 | IRON-BASED CATALYSTS ; MEMBRANE FUEL-CELLS ; FE/N/C-CATALYSTS ; ACTIVE-SITES ; ELECTROREDUCTION ; PHTHALOCYANINE ; POLYANILINE |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000395726500018 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285108]  |
| 专题 | 高能物理研究所_加速器中心 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 | Zheng LR,Chen, JH,Zhao, JX,et al. Meta-Organic-Framework-Derived Fe-N/C Electrocatalyst with Five-Coordinated Fe-N-x), Sites for Advanced Oxygen Reduction in Acid Media[J]. ACS CATALYSIS,2017,7(3):1655-1663. |
| APA | 郑黎荣.,Chen, JH.,Zhao, JX.,He, JP.,Liang, YY.,...&Lai, QX.(2017).Meta-Organic-Framework-Derived Fe-N/C Electrocatalyst with Five-Coordinated Fe-N-x), Sites for Advanced Oxygen Reduction in Acid Media.ACS CATALYSIS,7(3),1655-1663. |
| MLA | 郑黎荣,et al."Meta-Organic-Framework-Derived Fe-N/C Electrocatalyst with Five-Coordinated Fe-N-x), Sites for Advanced Oxygen Reduction in Acid Media".ACS CATALYSIS 7.3(2017):1655-1663. |
入库方式： OAI收割
来源：高能物理研究所
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