An oxyhydride of BaTiO3 exhibiting hydride exchange and electronic conductivity

Yoji Kobayashi, Olivier J. Hernandez, Tatsunori Sakaguchi, Takeshi Yajima, Thierry Roisnel, Yoshihiro Tsujimoto, Masaki Morita, Yasuto Noda, Yuuki Mogami, Atsushi Kitada, Masatoshi Ohkura, Saburo Hosokawa, Zhaofei Li, Katsuro Hayashi, Yoshihiro Kusano, Jung Eun Kim, Naruki Tsuji, Akihiko Fujiwara, Yoshitaka Matsushita, Kazuyoshi YoshimuraKiyonori Takegoshi, Masashi Inoue, Mikio Takano, Hiroshi Kageyama

研究成果: Contribution to journalArticle査読

178 被引用数 (Scopus)

抄録

In oxides, the substitution of non-oxide anions (F -S 2-N 3- and so on) for oxide introduces many properties, but the least commonly encountered substitution is where the hydride anion (H-) replaces oxygen to form an oxyhydride. Only a handful of oxyhydrides have been reported, mainly with electropositive main group elements or as layered cobalt oxides with unusually low oxidation states. Here, we present an oxyhydride of the perhaps most well-known perovskite, BaTiO3, as an O 2-/H-solid solution with hydride concentrations up to 20% of the anion sites. BaTiO3-x Hx is electronically conducting, and stable in air and water at ambient conditions. Furthermore, the hydride species is exchangeable with hydrogen gas at 400°C. Such an exchange implies diffusion of hydride, and interesting diffusion mechanisms specific to hydrogen may be at play. Moreover, such a labile anion in an oxide framework should be useful in further expanding the mixed-anion chemistry of the solid state.

本文言語英語
ページ(範囲)507-511
ページ数5
ジャーナルNature Materials
11
6
DOI
出版ステータス出版済み - 6 2012
外部発表はい

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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