期刊
CHEMICAL ENGINEERING JOURNAL
卷 411, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.128492
关键词
Oxygen reduction reaction; Oxygen evolution reaction; 2D Fe, N-codoped graphene; 2,5-Benzimidazole; Montmorillonite template
资金
- National Natural Science Foundation [21776167, 21805170, 21276148, 2019ZBXC411]
- State Key Laboratory of Chemical Engineering (Tianjin University) [SKL-ChE-14B01]
- Chemical Engineering and Technology First-class Subject of Shandong Province
The 2D Fe, N-codoped graphene (2D Fe-NG) was prepared using a nitrogen-containing polymer (ABPBI), Fe salts, and a cationic surface-active agent treated montmorillonite (CMMT) layer template. The addition of Fe3+ in the form of Fe-N-x bonds formed by coordination with N species of ABPBI in MMT contributes to the excellent ORR performance in O-2-saturated 0.1 M KOH electrolyte and close-to-RuO2 OER performance. The self-made ZAB based on 2D Fe-NG demonstrates high peak power density, excellent rechargeable performance, and higher DC cycling stability.
The 2D Fe, N-codoped graphene (2D Fe-NG) with high oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) performances for Zn-air batteries (ZABs) is prepared by a facile synthesis method, which used nitrogen-containing polymer (2,5-benzimidazole) (ABPBI), Fe salts and the cationic surface-active agent treated montmorillonite (CMMT) layer template. The vacuum assist and heat treatment of ABPBI/CMMT at 350 degrees C are the keys of Fe3+ addition. The characterization analysis demonstrates that added Fe3+ exists in the form of Fe-N-x bonds formed by coordination with N species of ABPBI in MMT. Owing to the existed Fe-N-x sites in 2D Fe-NG, it possesses excellent ORR performance better than 2D NG and 20 wt% Pt/C in O-2-saturated 0.1 M KOH electrolyte. For OER, the performance of 2D Fe-NG is close to that of RuO2. The self-made ZAB based on 2D Fe-NG exhibits high peak power density, excellent rechargeable performance, and higher D-C cycling stability.
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