ZIF-8/LiFePO4 derived Fe-N-P Co-doped carbon nanotube encapsulated Fe2P nanoparticles for efficient oxygen reduction and Zn-air batteries

Iron-based oxygen reduction reaction (ORR) catalysts have been the focus of research, and iron sources play an important role for the preparation of efficient ORR catalysts. Here, we successfully use LiFePO 4 as ideal sources of Fe and P to construct the heteroatom doped Fe-based carbon materials. T...

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Bibliographic Details
Published in:Nano research 2020-03, Vol.13 (3), p.818-823
Main Authors: Jin, Huihui, Zhou, Huang, Ji, Pengxia, Zhang, Chengtian, Luo, Jiahuan, Zeng, Weihao, Hu, Chenxi, He, Daping, Mu, Shichun
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Carbon
Carbon nanotubes
Catalysts
Chemical reduction
Chemistry and Materials Science
Condensed Matter Physics
Electrolytes
Encapsulation
Hazardous wastes
Iron
Materials Science
Metal air batteries
Nanoparticles
Nanotechnology
Oxygen
Oxygen reduction reactions
Platinum
Research Article
Sustainable development
Zinc-oxygen batteries
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Summary:Iron-based oxygen reduction reaction (ORR) catalysts have been the focus of research, and iron sources play an important role for the preparation of efficient ORR catalysts. Here, we successfully use LiFePO 4 as ideal sources of Fe and P to construct the heteroatom doped Fe-based carbon materials. The obtained Fe-N-P co-doped coral-like carbon nanotube arrays encapsulated Fe 2 P catalyst (C-ZIF/LFP) shows very high half-wave potential of 0.88 V in alkaline electrolytes toward ORR, superior to Pt/C (0.85 V), and also presents a high half-wave potential of 0.74 V in acidic electrolytes, comparable to Pt/C (0.8 V). When further applied into a home-made Zn-air battery as cathode, a peak power density of 140 mW·cm 2 is reached, exceeds commercial Pt/C (110 mW·cm 2 ). Besides, it also presents exceptional durability and methanol resistance compared with Pt/C. Noticeably, the preparation method of such a high-performance catalyst is simple and easy to optimize, suitable for the large-scale production. What’s more, it opens up a more sustainable development scenario to reduce the hazardous wastes such as LiFePO 4 by directly using them for preparing high-performance ORR catalysts.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-020-2702-3