期刊
ELECTROCHIMICA ACTA
卷 231, 期 -, 页码 549-556出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.01.104
关键词
3D Fe/N co-doped mesoporous carbon; nanomaterials; Pyrolysis; Oxygen reduction reaction; Active sites; Fuel cell
资金
- National Natural Science Foundation [21575090]
- Beijing Municipal Natural Science Foundation [2162009]
- Youth Talent Project of the Beijing Municipal Commission of Education [CITTCD201504072]
- Scientific Research Base Development Program of the Beijing Municipal Commission of Education
In this study, efficient electrocatalysts for oxygen reduction reaction (ORR), 3D Fe/N co-doped mesoporous carbon nanomaterials (Fe-N-C) are synthesized by inexpensive precursors i.e. tris( hydroxymethy)-aminomethane, citric acid and ferric chloride by a facile pyrolysis method under temperature from 750 to 950 C-omicron. In these prepared Fe-N-C-750, Fe-N-C-850, Fe-N-C-950 and N-C-850 catalysts, Fe-N-C-850 catalyst demonstrates the best ORR catalytic activity with relatively positive onset potential of 0.92 V, higher current density, long-time stability, better poisoning resistance to methanol and a near direct four-electron reaction pathway in alkaline solution. All the best performance of Fe-N-C-850 are attributed to the co-presence of Fe3C, Fe-N and pyridinic N active sites. These results suggest that the as-prepared Fe-N-C-850 catalyst is a facile accessible and efficient ORR catalyst for fuel cell applications. (C) 2017 Published by Elsevier Ltd.
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