Activation and its mechanism of oxygen evolution reaction catalysts by unusual valence iron ions

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H04169
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Metal making/Resorce production engineering
• Research Institution: The University of Tokyo (2016-2017); Osaka Prefecture University (2015)
• Principal Investigator: Yagi Shunsuke 東京大学, 生産技術研究所, 准教授 (60452273)
• Co-Investigator(Kenkyū-buntansha): 梅澤 直人 国立研究開発法人物質・材料研究機構, 光触媒材料センター, 主任研究員 (20455273)
• Co-Investigator(Renkei-kenkyūsha): YAMADA Ikuya 大阪府立大学, 大学院工学研究科 物質・化学系専攻 マテリアル工学分野, 准教授 (30378880) ; IKENO Hidekazu 大阪府立大学, 研究推進機構, 講師 (30584833) ; HIRAI Shigeto 北見工業大学, 地球環境工学科 先端物質材料工学コース, 助教 (80756669)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 電気化学触媒 / 酸素発生反応 / 酸素還元反応 / 異常原子価イオン / 結晶構造 / 二機能性触媒 / 電極

Outline of Final Research Achievements

Perovskite oxides have been attracting attention as catalysts having high catalytic activities for the oxygen evolution reaction (OER), which is an essential reaction for industrial applications. By the support of this research grant, we clarified that unusual iron ions (Fe4+ ions) at B sites in the perovskite structure play an important role to achieve the high catalytic activity for OER, and we proposed the mechanism explaining the reason why the quadruple perovskite oxides have high catalytic activities for OER based on the structural analyses observations. Furthermore, bifunctional electrochemical catalysts AMn3Mn4O12 (A=Ca, La) were developed, which were active for both the OER and oxygen reduction reaction (ORR) by changing the structure of manganese oxides originally active for ORR to quadruple perovskite.

Free Research Field

材料電気化学