Synthesis and H− conductivity of a new oxyhydride Ba2YHO3 with anion-ordered rock-salt layers

Haq Nawaz; Fumitaka Takeiri; Akihide Kuwabara; Masao Yonemura; Genki Kobayashi

doi:10.1039/D0CC03638B

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Synthesis and H⁻ conductivity of a new oxyhydride Ba₂YHO₃ with anion-ordered rock-salt layers†

Haq Nawaz,^ab Fumitaka Takeiri,

^ab Akihide Kuwabara,

^c Masao Yonemura^d and Genki Kobayashi

*^ab

Author affiliations

* Corresponding authors

^a Department of Materials Molecular Science, Institute for Molecular Science, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan
E-mail: gkobayashi@ims.ac.jp

^b SOKENDAI (The Graduate University for Advanced Studies), 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan

^c Nanostructures Research Laboratory, Japan Fine Ceramics Center, 2-4-1 Mutsuno, Atsuta, Nagoya 456-8587, Japan

^d Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 203-1, Shirakata, Tokai, Ibaraki 319-1106, Japan

Abstract

A new layered perovskite oxyhydride Ba₂YHO₃ was synthesized via high pressure synthesis. Powder X-ray and neutron diffraction experiments revealed that in Ba₂YHO₃ the ordered H⁻ and O²⁻ anions form [Ba₂H₂] rock-salt layers wherein H⁻ conduction is allowed. The conductivity reached 0.1 mS cm⁻¹ at 350 °C, which is higher than that of isostructural Ba₂ScHO₃ with anion-disordered [Ba₂HO] layers.

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Article information

DOI: https://doi.org/10.1039/D0CC03638B
Article type: Communication
Submitted: 22 May 2020
Accepted: 29 Jul 2020
First published: 30 Jul 2020

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Chem. Commun., 2020,56, 10373-10376

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Synthesis and H⁻ conductivity of a new oxyhydride Ba₂YHO₃ with anion-ordered rock-salt layers

H. Nawaz, F. Takeiri, A. Kuwabara, M. Yonemura and G. Kobayashi, Chem. Commun., 2020, 56, 10373 DOI: 10.1039/D0CC03638B

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Chemical Communications