title: Bifunctional Oxygen Reaction Catalysis of Quadruple Manganese Perovskites.
abstract: Bifunctional electrocatalysts for oxygen evolution/reduction reaction (OER/ORR) are desirable for the development of energy conversion technologies. It is discovered that the manganese quadruple perovskites CaMn7O12and LaMn7O12show bifunctional catalysis in the OER/ORR. A possible origin of the high OER activity is the unique surface structure through corner-shared planar MnO4and octahedral MnO6units to promote direct OO bond formations.
authors.affiliation: Nanoscience and Nanotechnology Research Center, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8570, Japan.
authors.forename: Ikuya
authors.initials: I
authors.lastname: Yamada
authors.affiliation: Nanoscience and Nanotechnology Research Center, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8570, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Fujii
authors.affiliation: Nanoscience and Nanotechnology Research Center, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8570, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Takamatsu
authors.affiliation: Nanoscience and Nanotechnology Research Center, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8570, Japan.
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Ikeno
authors.affiliation: Fuji Die Co., Ltd, 36-1 Hirasawa, Hadano, Kanagawa, 257-0015, Japan.
authors.forename: Kouhei
authors.initials: K
authors.lastname: Wada
authors.affiliation: Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan.
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Tsukasaki
authors.affiliation: Japan Synchrotron Radiation Research Institute, 1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan.
authors.forename: Shogo
authors.initials: S
authors.lastname: Kawaguchi
authors.affiliation: Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka, 599-8531, Japan.
authors.forename: Shigeo
authors.initials: S
authors.lastname: Mori
authors.affiliation: Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 143-8505, Japan.
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Yagi
keywords: bifunctional electrocatalysts; manganese oxides; oxygen evolution reaction; oxygen reduction reaction; quadruple perovskite