Surface Proton Conduction of Sm-Doped CeO2-δ Thin Film Preferentially Grown on Al2O3 (0001)

D. Nishioka, T. Tsuchiya, W. Namiki, M. Takayanagi, K. Kawamura, T. Fujita, R. Yukawa, K. Horiba, H. Kumigashira, T. Higuchi

研究成果: Article

抜粋

Sm-doped CeO2-δ (Ce0.9Sm0.1O2-δ; SDC) thin films were prepared on Al2O3 (0001) substrates by radio frequency magnetron sputtering. The prepared thin films were preferentially grown along the [111] direction, with the spacing of the (111) plane (d111) expanded by 2.6% to compensate for a lattice mismatch against the substrate. The wet-annealed SDC thin film, with the reduced d111 value, exhibited surface protonic conduction in the low-temperature region below 100 °C. The O1s photoemission spectrum exhibits H2O and OH peaks on the SDC surface. These results indicate the presence of physisorbed water layers and the generation of protons on the SDC (111) surface with oxygen vacancies. The protons generated on the SDC surface were conducted through a physisorbed water layer by the Grotthuss mechanism.

元の言語English
記事番号42
ジャーナルNanoscale Research Letters
15
発行部数1
DOI
出版物ステータスPublished - 2020

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

フィンガープリント Surface Proton Conduction of Sm-Doped CeO<sub>2-δ</sub> Thin Film Preferentially Grown on Al<sub>2</sub>O<sub>3</sub> (0001)' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用

    Nishioka, D., Tsuchiya, T., Namiki, W., Takayanagi, M., Kawamura, K., Fujita, T., Yukawa, R., Horiba, K., Kumigashira, H., & Higuchi, T. (2020). Surface Proton Conduction of Sm-Doped CeO2-δ Thin Film Preferentially Grown on Al2O3 (0001). Nanoscale Research Letters, 15(1), [42]. https://doi.org/10.1186/s11671-020-3267-5