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- Title
Efficient Bifunctional Oxygen Electrocatalysts for Rechargeable Zinc–Air Battery: Fe<sub>3</sub>O<sub>4</sub>/N−C Nanoflowers Derived from Aromatic Polyamide.
- Authors
Liu, Yanping; Qiao, Bin; Jia, Nan; Shi, Shufeng; Chen, Xinbing; An, Zhongwei; Chen, Pei
- Abstract
The development of low‐cost, high‐activity bifunctional oxygen electrocatalysts for rechargeable zinc–air batteries is highly desired. Herein, N‐doped carbon nanoflower embedded Fe3O4 nanoparticles were prepared using a simple and scalable method. The obtained electrocatalyst exhibits excellent activity and stability toward both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), as well as a small potential gap of 0.72 V between the half‐wave potential of ORR and the onset potential of OER potential, which is superior to the most previously reported bifunctional ORR/OER catalysts. The corresponding zinc–air battery exhibits good charged/discharge cycle performance as well as excellent discharge property, with a power density of 136.8 mW cm−2 at 200 mA cm−2 outperforming commercial Pt/C (96.5mW cm−2). Experiment results and density functional theory demonstrate that the high catalysis activity is mainly caused by the surface oxygen vacancy of Fe3O4 nanoparticles. This study sheds new light on the ORR/OER bifunctional electrocatalyst design.
- Subjects
ARAMID fibers; IRON oxide nanoparticles; STORAGE batteries; ELECTROCATALYSTS; CATALYTIC activity
- Publication
ChemCatChem, 2022, Vol 14, Issue 4, p1
- ISSN
1867-3880
- Publication type
Article
- DOI
10.1002/cctc.202101523