Oxidative Corrosion Mechanism for Ag@C Coaxial Nanocables in Radiolytic Water

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• 作者：Yue Lu ; Kuan Wang ; Jingwei Li ; Yonghe Li ; Wei Zhang ; Manling Sui
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：December 1, 2016
• 年：2016
• 卷：120
• 期：47
• 页码：27033-27039
• 全文大小：523K
• ISSN：1932-7455

文摘

To date it remains challenging to clarify the corrosion mechanism of coaxial nanocables in an oxidative moisture environment, which sets an immediate bottleneck for their engineering application. Herein, we report a series of in situ structure evolutions of Ag and Ag@C coaxial nanocables in a liquid environmental transmission electron microscope, followed with mechanistic unraveling of their oxidative corrosion. The bubbles generated by Ag nanocable oxidation inversely triggered rapid dissolution of the nanocables in radiolytic water. For the complicated dissolution of Ag@C nanocables, the oxidative species interact with carbon defects to thicken the carbon shell; as a consequence of holes drilling-on and exposure to the oxidative water, the inner Ag nanocables were triggered for its dissolution. The derived oxidation mechanism of nanocables provides us new insight into accurately controlling antioxidative chemistry.