Electrical conduction and mass transport properties of SrZr 0.99Fe0.01O3-δ

Atsushi Unemoto, Atsushi Kaimai, Kazuhisa Sato, Naoto Kitamura, Keiji Yashiro, Hiroshige Matsumoto, Junichiro Mizusaki, Koji Amezawa, Tatsuya Kawada

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)

抄録

The electrical conductivity of SrZr0.99Fe0.01O 3-δ was evaluated by a four-probe ac technique. The measurements were conducted in hydrogen and in oxygen containing atmospheres at 823 ≤T/K≤ 1273. It was found from the X-ray absorption spectroscopic measurements that Fe in the oxide is trivalent both in hydrogen and in oxygen. In order to determine the major carrier in the oxide, gas partial pressure dependences and isotope effect of hydrogen and deuteron on the electrical conductivity was investigated. In humidified hydrogen, it was found that proton conduction is predominant in the lower temperature region while oxide ion conduction starts to contribute to the total by increasing temperature of above 1173K. In oxygen containing gas, the protonic conduction is found to be predominant at lower temperatures while the contribution of the electron hole conduction is significant at higher temperatures. Hydrogen evolution property was evaluated using the SrZr0.99Fe0.01O 3-δ disc as a solid electrolyte. Hydrogen evolution rate obeyed the Faraday's law in humidified hydrogen at 1173K, suggesting that the transport number of ionic species is unity.

元の言語英語
ページ(範囲)868-873
ページ数6
ジャーナルSolid State Ionics
181
発行部数19-20
DOI
出版物ステータス出版済み - 7 16 2010

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Transport properties
Hydrogen
Mass transfer
transport properties
conduction
hydrogen
Oxides
Oxygen
oxides
oxygen
Gases
Temperature
electrical resistivity
Deuterium
Solid electrolytes
X ray absorption
solid electrolytes
Isotopes
Partial pressure
isotope effect

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

これを引用

Unemoto, A., Kaimai, A., Sato, K., Kitamura, N., Yashiro, K., Matsumoto, H., ... Kawada, T. (2010). Electrical conduction and mass transport properties of SrZr 0.99Fe0.01O3-δ. Solid State Ionics, 181(19-20), 868-873. https://doi.org/10.1016/j.ssi.2010.05.002

Electrical conduction and mass transport properties of SrZr 0.99Fe0.01O3-δ. / Unemoto, Atsushi; Kaimai, Atsushi; Sato, Kazuhisa; Kitamura, Naoto; Yashiro, Keiji; Matsumoto, Hiroshige; Mizusaki, Junichiro; Amezawa, Koji; Kawada, Tatsuya.

:: Solid State Ionics, 巻 181, 番号 19-20, 16.07.2010, p. 868-873.

研究成果: ジャーナルへの寄稿記事

Unemoto, A, Kaimai, A, Sato, K, Kitamura, N, Yashiro, K, Matsumoto, H, Mizusaki, J, Amezawa, K & Kawada, T 2010, 'Electrical conduction and mass transport properties of SrZr 0.99Fe0.01O3-δ', Solid State Ionics, 巻. 181, 番号 19-20, pp. 868-873. https://doi.org/10.1016/j.ssi.2010.05.002
Unemoto, Atsushi ; Kaimai, Atsushi ; Sato, Kazuhisa ; Kitamura, Naoto ; Yashiro, Keiji ; Matsumoto, Hiroshige ; Mizusaki, Junichiro ; Amezawa, Koji ; Kawada, Tatsuya. / Electrical conduction and mass transport properties of SrZr 0.99Fe0.01O3-δ. :: Solid State Ionics. 2010 ; 巻 181, 番号 19-20. pp. 868-873.
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abstract = "The electrical conductivity of SrZr0.99Fe0.01O 3-δ was evaluated by a four-probe ac technique. The measurements were conducted in hydrogen and in oxygen containing atmospheres at 823 ≤T/K≤ 1273. It was found from the X-ray absorption spectroscopic measurements that Fe in the oxide is trivalent both in hydrogen and in oxygen. In order to determine the major carrier in the oxide, gas partial pressure dependences and isotope effect of hydrogen and deuteron on the electrical conductivity was investigated. In humidified hydrogen, it was found that proton conduction is predominant in the lower temperature region while oxide ion conduction starts to contribute to the total by increasing temperature of above 1173K. In oxygen containing gas, the protonic conduction is found to be predominant at lower temperatures while the contribution of the electron hole conduction is significant at higher temperatures. Hydrogen evolution property was evaluated using the SrZr0.99Fe0.01O 3-δ disc as a solid electrolyte. Hydrogen evolution rate obeyed the Faraday's law in humidified hydrogen at 1173K, suggesting that the transport number of ionic species is unity.",
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AU - Yashiro, Keiji

AU - Matsumoto, Hiroshige

AU - Mizusaki, Junichiro

AU - Amezawa, Koji

AU - Kawada, Tatsuya

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AB - The electrical conductivity of SrZr0.99Fe0.01O 3-δ was evaluated by a four-probe ac technique. The measurements were conducted in hydrogen and in oxygen containing atmospheres at 823 ≤T/K≤ 1273. It was found from the X-ray absorption spectroscopic measurements that Fe in the oxide is trivalent both in hydrogen and in oxygen. In order to determine the major carrier in the oxide, gas partial pressure dependences and isotope effect of hydrogen and deuteron on the electrical conductivity was investigated. In humidified hydrogen, it was found that proton conduction is predominant in the lower temperature region while oxide ion conduction starts to contribute to the total by increasing temperature of above 1173K. In oxygen containing gas, the protonic conduction is found to be predominant at lower temperatures while the contribution of the electron hole conduction is significant at higher temperatures. Hydrogen evolution property was evaluated using the SrZr0.99Fe0.01O 3-δ disc as a solid electrolyte. Hydrogen evolution rate obeyed the Faraday's law in humidified hydrogen at 1173K, suggesting that the transport number of ionic species is unity.

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