Atomic Structure of a CeO2 Grain Boundary: The Role of Oxygen Vacancies

被引：179

作者：

Hojo, Hajime ^{[1
]}

Mizoguchi, Teruyasu ^{[2
]}

Ohta, Hiromichi ^{[3
,4
]}

Findlay, Scott D. ^{[1
]}

Shibata, Naoya ^{[1
,4
]}

Yamamoto, Takahisa ^{[1
,5
]}

Ikuhara, Yuichi ^{[1
,5
,6
]}

机构：

[1] Univ Tokyo, Sch Engn, Inst Engn Innovat, Tokyo 1138656, Japan

[2] Univ Tokyo, Inst Ind Sci, Tokyo 1138656, Japan

[3] Nagoya Univ, Grad Sch Engn, Nagoya, Aichi 4648603, Japan

[4] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

[5] Japan Fine Ceram Ctr, Nanostruct Res Lab, Nagoya, Aichi 4568587, Japan

[6] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

NANO LETTERS | 2010年 / 10卷 / 11期

基金：

日本学术振兴会;

关键词：

CeO2; grain boundary structure; TEM; HAADF; ABF; oxygen nonstoichiometry; ELECTRICAL-PROPERTIES; SOLUTE SEGREGATION; ENERGY; RESOLUTION; OXIDES; DEFECT; CERIA; CONDUCTIVITY; CHEMISTRY; ELEMENTS;

D O I：

10.1021/nl1029336

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Determining both cation and oxygen sublattices of grain boundaries is essential to understand the properties of oxides. Here, with scanning transmission electron microscopy, electron energy-loss spectroscopy, and first-principles calculations, both the Ce and oxygen sublattices of a (210)Sigma 5 CeO2 grain boundary were determined. Oxygen vacancies are shown to play a crucial role in he stable grain boundary structure. This finding paves the way for a comprehensive understanding of grain boundaries through the atomic scale determination of atom and defect locations.

引用

页码：4668 / 4672

页数：5

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