Covalency-reinforced oxygen evolution reaction catalyst

Shunsuke Yagi (), Ikuya Yamada (), Hirofumi Tsukasaki, Akihiro Seno, Makoto Murakami, Hiroshi Fujii, Hungru Chen, Naoto Umezawa, Hideki Abe, Norimasa Nishiyama and Shigeo Mori
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Shunsuke Yagi: Nanoscience and Nanotechnology Research Centre, Osaka Prefecture University
Ikuya Yamada: Nanoscience and Nanotechnology Research Centre, Osaka Prefecture University
Hirofumi Tsukasaki: Osaka Prefecture University
Akihiro Seno: Nanoscience and Nanotechnology Research Centre, Osaka Prefecture University
Makoto Murakami: Osaka Prefecture University
Hiroshi Fujii: Osaka Prefecture University
Hungru Chen: National Institute for Materials Science
Naoto Umezawa: Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency
Hideki Abe: Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency
Norimasa Nishiyama: Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency
Shigeo Mori: Osaka Prefecture University

Nature Communications, 2015, vol. 6, issue 1, 1-6

Abstract: Abstract The oxygen evolution reaction that occurs during water oxidation is of considerable importance as an essential energy conversion reaction for rechargeable metal–air batteries and direct solar water splitting. Cost-efficient ABO3 perovskites have been studied extensively because of their high activity for the oxygen evolution reaction; however, they lack stability, and an effective solution to this problem has not yet been demonstrated. Here we report that the Fe4+-based quadruple perovskite CaCu3Fe4O12 has high activity, which is comparable to or exceeding those of state-of-the-art catalysts such as Ba0.5Sr0.5Co0.8Fe0.2O3−δ and the gold standard RuO2. The covalent bonding network incorporating multiple Cu2+ and Fe4+ transition metal ions significantly enhances the structural stability of CaCu3Fe4O12, which is key to achieving highly active long-life catalysts.

Date: 2015
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DOI: 10.1038/ncomms9249

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