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Atomic-scale observation of a two-stage oxidation process in Cu2O
Shuangfeng Jia1(
), Jianbo Wang1,5()
), Jianbo Wang1,5()Abstract
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.
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Pages 2344-2350
Cite this article:
Liu H, Zheng H, Li L, et al. Atomic-scale observation of a two-stage oxidation process in Cu2O. Nano Research, 2017, 10(7): 2344-2350. https://doi.org/10.1007/s12274-017-1429-2
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