Atomic-scale observation of a two-stage oxidation process in Cu2O
Atomic-scale observation of a two-stage oxidation process in Cu2O
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Cu2O 两阶段氧化过程的原子尺度观察
DOI：
10.1007/s12274-017-1429-2
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发表时间：
2017
期刊：
影响因子：
9.9
通讯作者：
Wang Jianbo
中科院分区：
文献类型：
--
作者：
Liu Huihui;Zheng He;Li Lei;Sheng Huaping;Jia Shuangfeng;Cao Fan;Liu Xi;Chen Boyun;Xing Ru;Zhao Dongshan;Wang Jianbo
利用高分辨透射电子显微镜（TEM）原位直接观察了Cu 2 O纳米微晶（NC）的原子尺度氧化动力学。结果表明：（1）初始氧化阶段主要由位错介导的Cu_2O纳米晶的固-固转变氧化行为主导，并形成新的中间相Cu_2O_x。讨论了CuOx相的可能晶体结构。(2)随后，CuOx通过逐层氧化转化为CuO。这些结果将有助于理解铜氧化物的氧化机理，并为改善其结构多样性和开发其潜在的工业应用铺平道路。
Atomic-scale oxidation dynamics of Cu2O nanocrystallines (NCs) are directly observed byin situhigh-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 CuOxphase. The possible crystal structure of the CuOxphase is discussed. (2) Subsequently, CuOxis 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.