Oxyhydrides of (Ca,Sr,Ba)TiO3 perovskite solid solutions

Tatsunori Sakaguchi; Yoji Kobayashi; Takeshi Yajima; Masatoshi Ohkura; Cédric Tassel; Fumitaka Takeiri; Shingo Mitsuoka; Hiroshi Ohkubo; Takafumi Yamamoto; Jung Eun Kim; Naruki Tsuji; Akihiko Fujihara; Yoshitaka Matsushita; James Hester; Maxim Avdeev; Kenji Ohoyama; Hiroshi Kageyama

doi:10.1021/ic300859n

Oxyhydrides of (Ca,Sr,Ba)TiO3 perovskite solid solutions

Tatsunori Sakaguchi, Yoji Kobayashi, Takeshi Yajima, Masatoshi Ohkura, Cédric Tassel, Fumitaka Takeiri, Shingo Mitsuoka, Hiroshi Ohkubo, Takafumi Yamamoto, Jung Eun Kim, Naruki Tsuji, Akihiko Fujihara, Yoshitaka Matsushita, James Hester, Maxim Avdeev, Kenji Ohoyama, Hiroshi Kageyama

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

The oxyhydride solid solutions (Ca,Sr)TiO3-xHx and (Sr,Ba)TiO3-xHx have been prepared by reducing the corresponding ATiO3 oxides with calcium hydride. Under the reaction conditions examined, a hydride content of x = 0.1-0.3 was obtained for all compositions. Compared to our previous result with BaTiO3-xH x, the larger particle size in this study (20-30 μm vs 170 nm) resulted in a somewhat lower hydride amount despite prolonged reaction times. We examined changes in cell volume, octahedral tilt angle, and site occupancy of different anion sites after conversion to oxyhydrides; it appears that these oxyhydrides fit the geometrical descriptions typical for regular ABO3 perovskites quite well. The hydrogen release temperature, previously shown to be indicative of the hydride exchange temperature, however, does not scale linearly with the A-site composition, indicating a potential effect of chemical randomness. © 2012 American Chemical Society.

Original language	English (US)
Pages (from-to)	11371-11376
Number of pages	6
Journal	Inorganic Chemistry
Volume	51
Issue number	21
DOIs	https://doi.org/10.1021/ic300859n
State	Published - Nov 5 2012
Externally published	Yes

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Generated from Scopus record by KAUST IRTS on 2022-09-13

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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title = "Oxyhydrides of (Ca,Sr,Ba)TiO3 perovskite solid solutions",

abstract = "The oxyhydride solid solutions (Ca,Sr)TiO3-xHx and (Sr,Ba)TiO3-xHx have been prepared by reducing the corresponding ATiO3 oxides with calcium hydride. Under the reaction conditions examined, a hydride content of x = 0.1-0.3 was obtained for all compositions. Compared to our previous result with BaTiO3-xH x, the larger particle size in this study (20-30 μm vs 170 nm) resulted in a somewhat lower hydride amount despite prolonged reaction times. We examined changes in cell volume, octahedral tilt angle, and site occupancy of different anion sites after conversion to oxyhydrides; it appears that these oxyhydrides fit the geometrical descriptions typical for regular ABO3 perovskites quite well. The hydrogen release temperature, previously shown to be indicative of the hydride exchange temperature, however, does not scale linearly with the A-site composition, indicating a potential effect of chemical randomness. {\textcopyright} 2012 American Chemical Society.",

author = "Tatsunori Sakaguchi and Yoji Kobayashi and Takeshi Yajima and Masatoshi Ohkura and C{\'e}dric Tassel and Fumitaka Takeiri and Shingo Mitsuoka and Hiroshi Ohkubo and Takafumi Yamamoto and Kim, {Jung Eun} and Naruki Tsuji and Akihiko Fujihara and Yoshitaka Matsushita and James Hester and Maxim Avdeev and Kenji Ohoyama and Hiroshi Kageyama",

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year = "2012",

month = nov,

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doi = "10.1021/ic300859n",

language = "English (US)",

volume = "51",

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TY - JOUR

T1 - Oxyhydrides of (Ca,Sr,Ba)TiO3 perovskite solid solutions

AU - Sakaguchi, Tatsunori

AU - Kobayashi, Yoji

AU - Yajima, Takeshi

AU - Ohkura, Masatoshi

AU - Tassel, Cédric

AU - Takeiri, Fumitaka

AU - Mitsuoka, Shingo

AU - Ohkubo, Hiroshi

AU - Yamamoto, Takafumi

AU - Kim, Jung Eun

AU - Tsuji, Naruki

AU - Fujihara, Akihiko

AU - Matsushita, Yoshitaka

AU - Hester, James

AU - Avdeev, Maxim

AU - Ohoyama, Kenji

AU - Kageyama, Hiroshi

N1 - Generated from Scopus record by KAUST IRTS on 2022-09-13

PY - 2012/11/5

Y1 - 2012/11/5

N2 - The oxyhydride solid solutions (Ca,Sr)TiO3-xHx and (Sr,Ba)TiO3-xHx have been prepared by reducing the corresponding ATiO3 oxides with calcium hydride. Under the reaction conditions examined, a hydride content of x = 0.1-0.3 was obtained for all compositions. Compared to our previous result with BaTiO3-xH x, the larger particle size in this study (20-30 μm vs 170 nm) resulted in a somewhat lower hydride amount despite prolonged reaction times. We examined changes in cell volume, octahedral tilt angle, and site occupancy of different anion sites after conversion to oxyhydrides; it appears that these oxyhydrides fit the geometrical descriptions typical for regular ABO3 perovskites quite well. The hydrogen release temperature, previously shown to be indicative of the hydride exchange temperature, however, does not scale linearly with the A-site composition, indicating a potential effect of chemical randomness. © 2012 American Chemical Society.

AB - The oxyhydride solid solutions (Ca,Sr)TiO3-xHx and (Sr,Ba)TiO3-xHx have been prepared by reducing the corresponding ATiO3 oxides with calcium hydride. Under the reaction conditions examined, a hydride content of x = 0.1-0.3 was obtained for all compositions. Compared to our previous result with BaTiO3-xH x, the larger particle size in this study (20-30 μm vs 170 nm) resulted in a somewhat lower hydride amount despite prolonged reaction times. We examined changes in cell volume, octahedral tilt angle, and site occupancy of different anion sites after conversion to oxyhydrides; it appears that these oxyhydrides fit the geometrical descriptions typical for regular ABO3 perovskites quite well. The hydrogen release temperature, previously shown to be indicative of the hydride exchange temperature, however, does not scale linearly with the A-site composition, indicating a potential effect of chemical randomness. © 2012 American Chemical Society.

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DO - 10.1021/ic300859n

M3 - Article

SN - 0020-1669

VL - 51

SP - 11371

EP - 11376

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 21

ER -

Oxyhydrides of (Ca,Sr,Ba)TiO3 perovskite solid solutions

Abstract

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