| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2026-03-19 |
| タイトル |
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タイトル |
Investigation of the interface structure and electronic state of nanocomposite La0.6 Sr0.4Co0.2Fe0.8O3−δ and Ce0.9Gd 0.1O2−δ electrodes for solid oxide fuel cells |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Daisuke Asakura
AIST
Tomohiro Ishiyama
AIST
Eiji Hosono
AIST
Katherine Develos-Bagarinao
AIST
Katsuhiko Yamaji
AIST
Masaki Kobayashi
Univ. of Tokyo
Kitamura Miho
Horiba Koji
Haruo Kishimoto
AIST
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
The interface structure and electronic state of nanocomposite La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) and Ce0.9Gd0.1O2−δ (gadolinium-doped ceria: GDC) electrodes for solid oxide fuel cells were investigated using scanning transmission electron microscopy (STEM) and soft X-ray absorption spectroscopy (XAS). The fine interface structure with compressive and extensive strains for LSCF and GDC, respectively, was observed by high-angle annular dark field STEM. The Fe L2,3-edge total-electron-yield (TEY) XAS results showed a slight difference: the crystal field splitting for the FeO6 octahedron of the LSCF and GDC nanocomposites is smaller than that of the LSCF bulk and thin film. This could be attributed to the strain effect at the interface. The Co L2,3-edge TEY XAS results revealed that the valence of Co for the nanocomposite was 2+ with a high-spin (HS) configuration, while that for LSCF bulk was almost 3+ with a low-spin configuration. The Co2+ HS state, which should be less stable than the Co3+ LS state, is evidence that the oxygen adsorption/desorption reactivity is enhanced by the nanocomposite structure. |
| 書誌情報 |
ACS Nano
巻 2026,
号 14,
p. 8857-8865,
発行日 2026-01
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| 出版者 |
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出版者 |
American Chemical Society |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1039/d5ta05378a |
