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Highly Active and Durable FeNiCo Oxyhydroxide Oxygen Evolution Reaction Electrocatalysts Derived from Fluoride Precursors

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Title: Highly Active and Durable FeNiCo Oxyhydroxide Oxygen Evolution Reaction Electrocatalysts Derived from Fluoride Precursors
Authors: Nishimoto, Masahiro Browse this author
Kitano, Sho Browse this author →KAKEN DB
Kowalski, Damian Browse this author
Aoki, Yoshitaka Browse this author →KAKEN DB
Habazaki, Hiroki Browse this author →KAKEN DB
Keywords: electrocatalyst
oxygen evolution reaction
FeNiCo alloy
Issue Date: 19-Jul-2021
Publisher: American Chemical Society
Journal Title: sustainable chemistry & engineering
Volume: 9
Issue: 28
Start Page: 9465
End Page: 9473
Publisher DOI: 10.1021/acssuschemeng.1c03116
Abstract: Developing highly active and durable electro-catalysts, consisting of earth-abundant elements, for oxygen evolution reaction (OER) is pivotal for large-scale water splitting for hydrogen production. Herein, we report that the commercially available FeNiCo alloy can be converted to a highly active electrocatalyst for OER by galvanostatic anodizing in a fluoride-containing ethylene glycol electrolyte. Anodizing of the alloy develops a porous film consisting of the (FeNiCo)F-2 phase, which is readily converted to a highly active porous oxyhydroxide during anodic polarization in a KOH electrolyte. The anodized alloy exhibits high activity and high durability for OER with an overpotential as low as 0.26 V at a current density of 10 mA cm(-2). The present study demonstrates that a simple and cost-effective anodizing process can be used to form a highly active OER electrode from a low-cost, practical, iron-based alloy. In addition, we found that fluorides containing Fe, Ni, and Co are excellent precursors for the formation of oxyhydroxides exhibiting high OER activity and durability.
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Sustainable Chemistry & Engineering, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
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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