Influence of dopant levels on the hydration properties of SZCY and BZCY proton conducting ceramics for hydrogen production

Kwati Leonard, Young Sung Lee, Yuji Okuyama, Kuninori Miyazaki, Hiroshige Matsumoto

研究成果: ジャーナルへの寄稿記事

21 引用 (Scopus)

抄録

Dense yttrium doped solid solutions of alkaline earth cerate and zirconate with the formula A(Zr5/9Ce4/9)1−xYxO3−δ, (A = Sr and Ba, x = 0.1, 0.2) have been prepared and studied as potential proton conducting electrolytes. Thermo-gravimetric analysis was used to determine the proton concentration in the specimens. BZCY(54)8/92 showed a maximum proton concentration limit of 17.1 mol % compared to only 6.03 mol % for SZCY(54)8/92 and retained the highest proton conductivity of 1.44 × 10−2 S cm−1 in wet 1% H2 at 600 °C. Sufficient chemical stability under 80% steam for 200 h was confirm for the said composition. Approximately similar proton mobility levels were observed at 600 °C for the compositions. The major difference in total conductivity originates mostly from the differences in proton concentration levels. The bulk and grain boundary contributions on the conductivity were strongly dependent on the A-site host, with the grain boundary response being the main source of resistance in the BZCY specimens relative to the SZCY.

元の言語英語
ページ(範囲)3926-3937
ページ数12
ジャーナルInternational Journal of Hydrogen Energy
42
発行部数7
DOI
出版物ステータス出版済み - 2 16 2017

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hydrogen production
Hydrogen production
Hydration
hydration
Protons
Doping (additives)
ceramics
conduction
protons
Grain boundaries
conductivity
grain boundaries
Proton conductivity
Chemical stability
Yttrium
Chemical analysis
Thermogravimetric analysis
Solid solutions
yttrium
Steam

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

これを引用

Influence of dopant levels on the hydration properties of SZCY and BZCY proton conducting ceramics for hydrogen production. / Leonard, Kwati; Lee, Young Sung; Okuyama, Yuji; Miyazaki, Kuninori; Matsumoto, Hiroshige.

:: International Journal of Hydrogen Energy, 巻 42, 番号 7, 16.02.2017, p. 3926-3937.

研究成果: ジャーナルへの寄稿記事

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