Chemical state of surrounding iron species affects the activity of Fe-N-x for electrocatalytic oxygen reduction
文献类型：期刊论文
| 作者 | Li, Zhongtao; Wei, Liangqin; Jiang, Wen-Jie; Hu, Zhenpeng; Luo, Hao; Zhao, Weinan; Xu, Tao; Wu, Wenting; Wu, Mingbo; Hu, Jin-Song |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2019-08-15 |
| 卷号 | 251页码:240-246 |
| ISSN号 | 0926-3373 |
| DOI | 10.1016/j.apcatb.2019.03.046 |
| 英文摘要 | Fe-N-C materials with Fe-N-x coordination sites are promising to replace the state-of-the-art Pt-based electrocatalysts for oxygen reduction reaction (ORR) due to high activity and low cost although there is still debate on its activity origin. Herein, we develop a strategy to investigate the role of iron species in Fe-N-C nanohybrids for catalysing ORR by delicately tuning the iron chemical state. By engineering peripheral substituents of iron porphyrin precursors, two Fe-N-C nanohybrids with metallic or oxidized iron species inside are achieved while holding the similar catalyst structure. Systematic experiments and theoretical analysis discover that metallic iron species promote the electrocatalytic activity of Fe-N-x sites for ORR, while oxidative ones inhibit O-2 adsorption on Fe-N-x sites, decreasing their ORR activity. This finding sheds light on unravelling the activity origin in Fe-N-C electrocatalysts for ORR towards their applications in energy devices. |
| 语种 | 英语 |
| WOS记录号 | WOS:000468014400025 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/82661]  |
| 专题 | 中国科学院化学研究所 |
| 作者单位 | Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhongtao,Wei, Liangqin,Jiang, Wen-Jie,et al. Chemical state of surrounding iron species affects the activity of Fe-N-x for electrocatalytic oxygen reduction[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2019,251:240-246. |
| APA | Li, Zhongtao.,Wei, Liangqin.,Jiang, Wen-Jie.,Hu, Zhenpeng.,Luo, Hao.,...&Hu, Jin-Song.(2019).Chemical state of surrounding iron species affects the activity of Fe-N-x for electrocatalytic oxygen reduction.APPLIED CATALYSIS B-ENVIRONMENTAL,251,240-246. |
| MLA | Li, Zhongtao,et al."Chemical state of surrounding iron species affects the activity of Fe-N-x for electrocatalytic oxygen reduction".APPLIED CATALYSIS B-ENVIRONMENTAL 251(2019):240-246. |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。