Durability of carbon-supported La-Mn-based perovskite-type oxides as oxygen reduction catalysts in strong alkaline solution

Masayoshi Yuasa, Noboru Yamazoe, Kengo Shimanoe

研究成果: ジャーナルへの寄稿学術誌査読

28 被引用数 (Scopus)

抄録

The durability of carbon-supported La-Mn-based perovskites for the oxygen reduction reaction in strong alkaline solutions was investigated. Carbon-supported perovskite-type oxide nanoparticles were prepared by using a reverse micelle method. The durability of the carbon-supported LaMnO3 nanoparticles was compared with that of carbon-supported LaMnO3 prepared by the mechanical mixing of LaMnO3 with the carbon support. As a result, the durability of the carbon-supported LaMnO3 nanoparticles was less than that of the carbon-supported LaMnO3 prepared by the mixing method due to a difference in the surface area of LaMnO3, which has an effect on the oxygen reduction reaction. In order to improve the durability of the carbon-supported LaMnO3 nanoparticles, Ca and Fe were substituted at the A-sites and B-sites of the perovskite lattice, respectively. As a result, it was found that the partial substitution of Ca and Fe is effective in improving the durability of LaMnO 3 under cathodic polarization in strong alkaline solutions. In particular, the substitution of Ca at the A-site not only improved the durability of the oxide but also enhanced the oxygen reduction activity owing to an increase in the average valence state of the B-sites of the perovskite lattice.

本文言語英語
ページ(範囲)A411-A416
ジャーナルJournal of the Electrochemical Society
158
4
DOI
出版ステータス出版済み - 2011

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 再生可能エネルギー、持続可能性、環境
  • 表面、皮膜および薄膜
  • 電気化学
  • 材料化学

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