期刊
ACS CATALYSIS
卷 9, 期 3, 页码 2158-2163出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.8b04381
关键词
single-atom Fe; porous carbons; electrocatalysis; oxygen reduction reaction; Zn-air battery; fuel cells
资金
- National Key R&D Program of China 2017YFA [0208300, 0700100]
- National Natural Science Foundation of China [21522107, 21671180, 21521091, 21802132, U1463202]
- Fundamental Research Funds for the Central Universities [WK2060190093]
- [2018M632536]
It is highly desired but remains a great challenge to develop nonprecious metal single-atom catalysts to supersede the Pt-based material for oxygen reduction reaction (ORR). Herein, we report a porous nitrogen-doped carbon matrix catalyst with 3.5 wt % single Fe atoms (Fe SAs/N-C) through a versatile molecules-confined pyrolysis strategy. In 0.1 M KOH condition, the Fe SAs/N-C catalyst possesses a half-wave potential of 0.91 V vs RHE. In a more challenging acidic solution, Fe SAs/N-C catalyst also offers good ORR activity, comparable with the commercial Pt/C. Impressively, Fe SAs/N-C shows extremely high stability both in alkaline and acidic media. In addition, this Fe SAs/N-C-derived Zn-air battery and proton exchange membrane fuel cells (PEMFCs) exhibit high performance. This work opens an avenue for designing and preparing single-atom catalysts.
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