Atomic-Level Fe-N-C Coupled with Fe3C-Fe Nanocomposites in Carbon Matrixes as High-Efficiency Bifunctional Oxygen Catalysts
文献类型：期刊论文
| 作者 | Sun, XP; Wei, P; Gu, SQ; Zhang, JX; Jiang, Z; Wan, J; Chen, ZY; Huang, L; Xu, Y; Fang, C |
| 刊名 | SMALL
 |
| 出版日期 | 2019 |
| 卷号 | 16期号:6页码:- |
| 关键词 | REDUCTION ELECTROCATALYSTS NANOPARTICLES PERFORMANCE IRON COORDINATION NANOSHEETS ORR IDENTIFICATION NANOTUBES |
| ISSN号 | 1613-6810 |
| DOI | 10.1002/smll.201906057 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Highly active and durable bifunctional oxygen electrocatalysts are of pivotal importance for clean and renewable energy conversion devices, but the lack of earth-abundant electrocatalysts to improve the intrinsic sluggish kinetic process of oxygen reduction/evolution reactions (ORR/OER) is still a challenge. Fe-N-C catalysts with abundant natural merits are considered as promising alternatives to noble-based catalysts, yet further improvements are urgently needed because of their poor stability and unclear catalytic mechanism. Here, an atomic-level Fe-N-C electrocatalyst coupled with low crystalline Fe3C-Fe nanocomposite in 3D carbon matrix (Fe-SAs/Fe3C-Fe@NC) is fabricated by a facile and scalable method. Versus atomically FeNx species and crystallized Fe3C-Fe nanoparticles, Fe-SAs/Fe3C-Fe@NC catalyst, abundant in vertical branched carbon nanotubes decorated on intertwined carbon nanofibers, exhibits high electrocatalytic activities and excellent stabilities both in ORR (E-1/2, 0.927 V) and OER (E-J=10, 1.57 V). This performance benefits from the strong synergistic effects of multicomponents and the unique structural advantages. In-depth X-ray absorption fine structure analysis and density functional theory calculation further demonstrate that more extra charges derived from modified Fe clusters decisively promote the ORR/OER performance for atomically FeN4 configurations by enhanced oxygen adsorption energy. These insightful findings inspire new perspectives for the rational design and synthesis of economical-practical bifunctional oxygen electrocatalysts. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31971]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Shanghai Inst Appl Phys, Shanghai Adv Res Inst, Shanghai 201204, Peoples R China; 2.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China; 3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China 4.Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Sun, XP,Wei, P,Gu, SQ,et al. Atomic-Level Fe-N-C Coupled with Fe3C-Fe Nanocomposites in Carbon Matrixes as High-Efficiency Bifunctional Oxygen Catalysts[J]. SMALL,2019,16(6):-. |
| APA | Sun, XP.,Wei, P.,Gu, SQ.,Zhang, JX.,Jiang, Z.,...&Huang, YH.(2019).Atomic-Level Fe-N-C Coupled with Fe3C-Fe Nanocomposites in Carbon Matrixes as High-Efficiency Bifunctional Oxygen Catalysts.SMALL,16(6),-. |
| MLA | Sun, XP,et al."Atomic-Level Fe-N-C Coupled with Fe3C-Fe Nanocomposites in Carbon Matrixes as High-Efficiency Bifunctional Oxygen Catalysts".SMALL 16.6(2019):-. |
入库方式： OAI收割
来源：上海应用物理研究所
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