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Brownmillerite‐type Ca 2 FeCoO 5 as a Practicable Oxygen Evolution Reaction Catalyst
Author(s) -
Tsuji Etsushi,
Motohashi Teruki,
Noda Hiroyuki,
Kowalski Damian,
Aoki Yoshitaka,
Tanida Hajime,
Niikura Junji,
Koyama Yukinori,
Mori Masahiro,
Arai Hajime,
Ioroi Tsutomu,
Fujiwara Naoko,
Uchimoto Yoshiharu,
Ogumi Zempachi,
Habazaki Hiroki
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201700499
Subject(s) - brownmillerite , catalysis , oxygen , oxygen evolution , chemistry , inorganic chemistry , chemical engineering , materials science , organic chemistry , electrode , engineering , electrochemistry
Here, we report remarkable oxygen evolution reaction (OER) catalytic activity of brownmillerite (BM)‐type Ca 2 FeCoO 5 . The OER activity of this oxide is comparable to or beyond those of the state‐of‐the‐art perovskite (PV)‐catalyst Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3− δ (BSCF) and a precious‐metal catalyst RuO 2 , emphasizing the importance of the characteristic BM structure with multiple coordination environments of transition metal (TM) species. Also, Ca 2 FeCoO 5 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.