2024-03-28T10:20:42Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/710272022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Brownmillerite-type Ca2FeCoO5 as a Practicable Oxygen Evolution Reaction CatalystTsuji, EtsushiMotohashi, TerukiNoda, HiroyukiKowalski, DamianAoki, YoshitakaTanida, HajimeNiikura, JunjiKoyama, YukinoriMori, MasahiroArai, HajimeIoroi, TsutomuFujiwara, NaokoUchimoto, YoshiharuOgumi, ZempachiHabazaki, Hirokibrownmilleriteelectrocatalystsoxygen evolution reactionperovskitestransition metals431Here, we report remarkable oxygen evolution reaction (OER) catalytic activity of brownmillerite (BM)-type Ca2FeCoO5. The OER activity of this oxide is comparable to or beyond those of the state-of-the-art perovskite (PV)-catalyst Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) and a precious-metal catalyst RuO2, emphasizing the importance of the characteristic BM structure with multiple coordination environments of transition metal (TM) species. Also, Ca2FeCoO5 is clearly advantageous in terms of expense/laboriousness of the material synthesis. These facts make this oxide a promising OER catalyst used in many energy conversion technologies such as metal-air secondary batteries and hydrogen production from electrochemical/photocatalytic water splitting.Wiley-BlackwellJournal Articleapplication/pdfapplication/pdfhttp://hdl.handle.net/2115/71027https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/71027/2/Brownmillerite_Supporting_Information-R-20170523.pdfhttps://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/71027/1/Manuscript-11.pdf1864-5631ChemSusChem1014286428682017-07-21enginfo:pmid/28544652info:doi/10.1002/cssc.201700499This is the peer reviewed version of the following article: ChemSusChem 10(14) July 21, 2017 pp.2864–2868, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/cssc.201700499/abstract. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.author