A labile hydride strategy for the synthesis of heavily nitridized BaTiO3

Yajima, Takeshi and Takeiri, Fumitaka and Aidzu, Kohei and Akamatsu, Hirofumi and Fujita, Koji and Yoshimune, Wataru and Lei, Shiming and Ohkura, Masatoshi and Gopalan, Venkatraman and Tanaka, Katsuhisa and Brown, Craig M. and Green, M.A. and Yamamoto, Takafumi and Kobayashi, Yoji and Kageyama, Hiroshi (2015) A labile hydride strategy for the synthesis of heavily nitridized BaTiO3. Nature Chemistry, 7 (12). pp. 1017-1023. ISSN 1755-4330. E-ISSN 1755-4349. (doi:https://doi.org/10.1038/nchem.2370) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1038/nchem.2370

Abstract

Oxynitrides have been explored extensively in the past decade because of their interesting properties, such as visible-light absorption, photocatalytic activity and high dielectric permittivity. Their synthesis typically requires high-temperature NH3 treatment (800-1,300 °C) of precursors, such as oxides, but the highly reducing conditions and the low mobility of N3- species in the lattice place significant constraints on the composition and structure-and hence the properties-of the resulting oxynitrides. Here we show a topochemical route that enables the preparation of an oxynitride at low temperatures (<500 °C), using a perovskite oxyhydride as a host. The lability of H-in BaTiO3-xHx (x � 0.6) allows H-/N3- exchange to occur, and yields a room-temperature ferroelectric BaTiO3-xN2x/3. This anion exchange is accompanied by a metal-to-insulator crossover via mixed O-H-N intermediates. These findings suggest that this 'labile hydride' strategy can be used to explore various oxynitrides, and perhaps other mixed anionic compounds. © 2015 Macmillan Publishers Limited. All rights reserved.

Item Type: Article
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Nat. Chem. [Field not mapped to EPrints] AD - Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, Japan [Field not mapped to EPrints] AD - Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba, Japan [Field not mapped to EPrints] AD - Department of Materials Science and Engineering, Pennsylvania State University, University Park, PA, United States [Field not mapped to EPrints] AD - Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, Japan [Field not mapped to EPrints] AD - NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD, United States [Field not mapped to EPrints] AD - School of Physical Sciences, University of Kent, Canterbury, Kent, United Kingdom [Field not mapped to EPrints] AD - CREST, Japan Science and Technology Agency, 7-3-1 Hongo, Tokyo, Japan [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Subjects: Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Mark Green
Date Deposited: 14 Dec 2015 09:40 UTC
Last Modified: 25 Aug 2017 11:34 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/53338 (The current URI for this page, for reference purposes)
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