Atomic-scale observation of a two-stage oxidation process in Cu2O

被引：10

作者：

Liu, Huihui ^{[1
,2
,3
]}

Zheng, He ^{[1
,2
,3
]}

Li, Lei ^{[1
,2
,3
]}

Sheng, Huaping ^{[1
,2
,3
]}

Jia, Shuangfeng ^{[1
,2
,3
]}

Cao, Fan ^{[1
,2
,3
]}

Liu, Xi ^{[1
,2
,3
,4
]}

Chen, Boyun ^{[1
,2
,3
,5
]}

Xing, Ru ^{[6
]}

Zhao, Dongshan ^{[1
,2
,3
]}

Wang, Jianbo ^{[1
,2
,3
,7
]}

机构：

[1] Wuhan Univ, Sch Phys & Technol, Ctr Electron Microscopy, Wuhan 430072, Peoples R China

[2] Wuhan Univ, MOE Key Lab Artificial Micro & Nanostruct, Wuhan 430072, Peoples R China

[3] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China

[4] Huazhong Univ Sci & Technol, Middle Sch, Wuhan 430074, Peoples R China

[5] Shuiguohu Senior Middle Sch, Wuhan 430071, Peoples R China

[6] Baotou Normal Coll, Dept Phys Sci & Technol, Baotou 014030, Peoples R China

[7] Cent S Univ, Sci & Technol High Strength Struct Mat Lab, Changsha 410083, Peoples R China

来源：

NANO RESEARCH | 2017年 / 10卷 / 07期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

oxidation; in situ electron microscopy; Cu2O; intermediated phases; IN-SITU; CUO NANOSTRUCTURES; REDUCTION; NANOWIRES; DYNAMICS;

D O I：

10.1007/s12274-017-1429-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Atomic-scale oxidation dynamics of Cu2O nanocrystallines (NCs) are directly observed by in situ high-resolution transmission electron microscopy. A two-stage oxidation process is observed: (1) The initial oxidation stage is dominated by the dislocation-mediated oxidation behavior of Cu2O NCs via solid-solid transformations, leading to the formation of a new intermediate CuOx phase. The possible crystal structure of the CuOx phase is discussed. (2) Subsequently, CuOx is transformed into CuO by layer-by-layer oxidation. These results will help in understanding the oxidation mechanisms of copper oxides and pave the way for improving their structural diversity and exploiting their potential industrial applications.

引用

页码：2344 / 2350

页数：7

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