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Long-term durability of platelet-type carbon nanofibers for OER and ORR in highly alkaline media

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Title: Long-term durability of platelet-type carbon nanofibers for OER and ORR in highly alkaline media
Authors: Sato, Yuki Browse this author
Kowalski, Damian Browse this author
Aoki, Yoshitaka Browse this author
Habazaki, Hiroki Browse this author →KAKEN DB
Keywords: Platelet type carbon
Zinc-air battery
Oxygen evolution reaction
Issue Date: 5-May-2020
Publisher: Elsevier
Journal Title: Applied catalysis A-general
Volume: 597
Start Page: 117555
Publisher DOI: 10.1016/j.apcata.2020.117555
Abstract: Highly durable air electrodes for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) in highly alkaline media are necessary to catalyze reactions in metal-air secondary batteries. Carbon is able to provide electronic conductivity and co-catalyze reactions, however, is typically oxidized under high-potential conditions above 1.1 V vs RHE. Herein, we demonstrate highly durable platelet-type carbon nanofibers (pCNFs) for OER/ORR in alkaline media. The pCNFs have graphene layers arranged perpendicularly to the fiber axis of the nanofibers. Such a specific configuration of the graphene layers in combination with a high degree of graphitization was found to be highly efficient in providing long-term durability combined with a state-of-the-art brownmillerite-type Ca2FeCoO5 catalyst. The improved oxidation resistance of the pCNF carbon is associated with the high degree of graphitization and the extremely slow oxidation rate of carbon edge planes at the sidewalls of the nanofibers.
Rights: ©2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 幅崎 浩樹

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