title: An oxyhydride of BaTiO3 exhibiting hydride exchange and electronic conductivity.
abstract: 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, BaTiO(3), as an O(2-)/H(-) solid solution with hydride concentrations up to 20% of the anion sites. BaTiO(3-x)H(x) 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.
authors.forename: Yoji
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Olivier J
authors.initials: OJ
authors.lastname: Hernandez
authors.forename: Tatsunori
authors.initials: T
authors.lastname: Sakaguchi
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yajima
authors.forename: Thierry
authors.initials: T
authors.lastname: Roisnel
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Tsujimoto
authors.forename: Masaki
authors.initials: M
authors.lastname: Morita
authors.forename: Yasuto
authors.initials: Y
authors.lastname: Noda
authors.forename: Yuuki
authors.initials: Y
authors.lastname: Mogami
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kitada
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Ohkura
authors.forename: Saburo
authors.initials: S
authors.lastname: Hosokawa
authors.forename: Zhaofei
authors.initials: Z
authors.lastname: Li
authors.forename: Katsuro
authors.initials: K
authors.lastname: Hayashi
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kusano
authors.forename: Jung eun
authors.initials: Je
authors.lastname: Kim
authors.forename: Naruki
authors.initials: N
authors.lastname: Tsuji
authors.forename: Akihiko
authors.initials: A
authors.lastname: Fujiwara
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Matsushita
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Yoshimura
authors.forename: Kiyonori
authors.initials: K
authors.lastname: Takegoshi
authors.forename: Masashi
authors.initials: M
authors.lastname: Inoue
authors.forename: Mikio
authors.initials: M
authors.lastname: Takano
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kageyama