N-doped carbon nanotubes containing a high concentration of single iron atoms for efficient oxygen reduction
文献类型：期刊论文
| 作者 | Li, JC; Yang, ZQ; Tang, DM; Zhang, L; Hou, PX; Zhao, SY; Liu, C; Cheng, M; Li, GX; Zhang, F |
| 刊名 | NPG ASIA MATERIALS
 |
| 出版日期 | 2018-01-12 |
| 卷号 | 10页码:- |
| 关键词 | Membrane Fuel-cells Porous Carbon Catalysts Electrocatalysts Frameworks Coordination Electrodes Complexes Hybrids Network |
| ISSN号 | 1884-4049 |
| 英文摘要 | Fe-N-C has emerged as a promising noble-metal-free catalyst for the oxygen reduction reaction (ORR). However, achieving a catalytic activity comparable to that of Pt in acidic medium remains a great challenge. Here we report a N-doped carbon nanotube (CNT) catalyst in which a high concentration of single Fe atoms has been dispersed (CNT@Fe-N-PC). The catalyst was prepared by a simple and scalable atomic isolation method, in which a metal isolation agent was introduced to isolate Fe atoms and was then evaporated to produce abundant micropores that host single Fe atom active sites. The CNT@Fe-N-PC catalyst contained a high concentration of single Fe atom active sites and exhibited ultrahigh ORR activity with a half-wave potential of 0.82 V, comparable to that of Pt/C in an acidic medium. A high concentration of Fe-N-x active sites was created on a flexible single-wall CNT film and carbon cloth using this technique, and these materials showed even better ORR performance, that is, 40-60 mV more positive onset potentials than those of a commercial Pt/C catalyst. These catalysts exhibit excellent catalytic activity, good durability and low cost, and show great potential for commercial use as substitutes for current Pt-based catalysts.; Fe-N-C has emerged as a promising noble-metal-free catalyst for the oxygen reduction reaction (ORR). However, achieving a catalytic activity comparable to that of Pt in acidic medium remains a great challenge. Here we report a N-doped carbon nanotube (CNT) catalyst in which a high concentration of single Fe atoms has been dispersed (CNT@Fe-N-PC). The catalyst was prepared by a simple and scalable atomic isolation method, in which a metal isolation agent was introduced to isolate Fe atoms and was then evaporated to produce abundant micropores that host single Fe atom active sites. The CNT@Fe-N-PC catalyst contained a high concentration of single Fe atom active sites and exhibited ultrahigh ORR activity with a half-wave potential of 0.82 V, comparable to that of Pt/C in an acidic medium. A high concentration of Fe-N-x active sites was created on a flexible single-wall CNT film and carbon cloth using this technique, and these materials showed even better ORR performance, that is, 40-60 mV more positive onset potentials than those of a commercial Pt/C catalyst. These catalysts exhibit excellent catalytic activity, good durability and low cost, and show great potential for commercial use as substitutes for current Pt-based catalysts. |
| 学科主题 | Materials Science, Multidisciplinary |
| 语种 | 英语 |
| 资助机构 | Ministry of Science and Technology of China [2016YFA0200102]; National Natural Science Foundation of China [51625203, 51532008, 51521091, 51572264]; Chinese Academy of Sciences [KGZD-EW-T06]; CAS/SAFEA International Partnership Program for Creative Research Teams; Liaoning BaiQian Wan Talents Program |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79583]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Hou, PX; Liu, C (reprint author), Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Li, JC,Yang, ZQ,Tang, DM,et al. N-doped carbon nanotubes containing a high concentration of single iron atoms for efficient oxygen reduction[J]. NPG ASIA MATERIALS,2018,10:-. |
| APA | Li, JC.,Yang, ZQ.,Tang, DM.,Zhang, L.,Hou, PX.,...&Liu, C .(2018).N-doped carbon nanotubes containing a high concentration of single iron atoms for efficient oxygen reduction.NPG ASIA MATERIALS,10,-. |
| MLA | Li, JC,et al."N-doped carbon nanotubes containing a high concentration of single iron atoms for efficient oxygen reduction".NPG ASIA MATERIALS 10(2018):-. |
入库方式： OAI收割
来源：金属研究所
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