2018年5月
Striking Oxygen-Release/Storage Properties of Fe-Site-Substituted Sr3Fe2O7-d
JOURNAL OF PHYSICAL CHEMISTRY C
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- 巻
- 122
- 号
- 21
- 開始ページ
- 11186
- 終了ページ
- 11193
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acs.jpcc.7b12754
- 出版者・発行元
- AMER CHEMICAL SOC
The present study explores the oxygen-storage capacity of Sr3Fe2O7-delta doped by other transition metals. Sr3Fe2O7-delta doped with Mn, Co, or Ni exhibited higher oxygen-storage amount and higher oxygen-release/storage rates than Sr3Fe2O7-delta; doping with Mn led to the highest oxygen-release/storage rates. Although reduced Sr-3(Fe0.8Co0.2)(2)O7-delta and Sr-3(Fe0.8Co0.2)(2)O7-delta had disordered coordination states around Fe and the transition-metal dopant, the local structure around the transition metals in the as-synthesized Sr-3(Fe0.8Co0.2)(2)O7-delta was almost kept intact even in the reduced state. These observations reveal that subtle differences in the ordering around transition-metal species before and after lattice-oxygen release significantly affect the oxide ion mobilities in the perovskite structures and also provide guidelines for designing novel oxygen-storage materials.
- リンク情報
- ID情報
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- DOI : 10.1021/acs.jpcc.7b12754
- ISSN : 1932-7447
- SCOPUS ID : 85046737426
- Web of Science ID : WOS:000434236700002