Promoted Hydride Substitution in BaTiO3 Cubes

被引：0

作者：

Arai, Kazunari ^{[1
]}

Onagi, Kaito ^{[2
]}

Tang, Ya ^{[1
]}

Ishigaki, Toru ^{[3
]}

Sai, Hiroaki ^{[1
]}

Sasahara, Yuki ^{[1
]}

Caruntu, Gabriel ^{[4
,5
]}

Okabe, Harumi ^{[6
]}

Harada, Masaru ^{[6
]}

Nakashima, Kouichi ^{[2
]}

Kageyama, Hiroshi ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Energy & Hydrocarbon Chem, Nishikyo ku, Kyoto 6158510, Japan

[2] Ibaraki Univ, Grad Sch Sci & Engn, Dept Mat Sci & Engn, Hitachi, Ibaraki 3168511, Japan

[3] Comprehens Res Org Sci & Soc, Neutron Ind Applicat Promot Ctr, Naka, Ibaraki 3191106, Japan

[4] Cent Michigan Univ, Dept Chem & Biochem, Mt Pleasant, MI 48859 USA

[5] Cent Michigan Univ, Sci Adv Mat Program, 1200 South Franklin St, Mt Pleasant, MI 48859 USA

[6] Tokyo Elect Power Co Holdings Inc, TEPCO Res Inst, Tsurumi ku, Yokohama 2308510, Japan

来源：

INORGANIC CHEMISTRY | 2024年 / 63卷 / 49期

基金：

日本学术振兴会;

关键词：

EPITAXIAL THIN-FILMS; ELECTRICAL-PROPERTIES; OXYHYDRIDES; ATIO(3-X)H(X); CONDUCTIVITY; ENHANCEMENT; TRANSITION; CATALYSTS; CERAMICS; EXCHANGE;

D O I：

10.1021/acs.inorgchem.4c03757

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

We report the synthesis of perovskite oxyhydride BaTiO3-x H x cubes (100-300 nm) using the topochemical hydride reaction of the hydrothermally synthesized oxide. X-ray and neutron diffraction studies revealed that the anion (hydride/oxide) exchange is greatly improved, leading to a maximum hydride content of 0.7, which is higher than previously reported, while no reaction is seen for those with oleic acid on their surface. These results indicate that the well-defined {100} facets, as well as the absence of organic residues, are crucial for promoting hydrogenation. Kissinger analysis on BaTiO2.3H0.7 yielded an activation energy of 165 kJ/mol, much lower than that of BaTiO2.4H0.6 (313 kJ/mol). In contrast to oxides, oxyhydrides with well-defined facets have not been reported before; thus, this study opens new avenues for the rational synthesis of oxyhydride materials with controlled chemical composition and morphology.

引用

页码：23260 / 23266

页数：7

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