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Material Sciences 2020
CoCl2-EMIC离子液体中无模板电沉积钴纳米线
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Abstract:
在CoCl2-EMIC离子液体体系中，采用方波电位、计时电位和计时电流的方法，研究了不同电化学条件下工作电极上的反应特性，确定适合电沉积制备钴纳米线的条件。研究发现：在？0.65 V的电位下，可以获得钴纳米线，其在钨电极上电沉积初始过程遵循扩散控制瞬时成核模型和三维生长方式。同时探索了此种离子液体在空气中的稳定性，结果表明该离子液体在空气中可以稳定保持96小时，不会吸收水分，同时在空气条件下可以实现钴纳米线的电化学沉积。
The reaction characters on working electrode at different electrochemical conditions for the elec-trodeposition of Co nanowires in CoCl2-1-ethyl-3-methylimidazolium chloride (CoCl2-EMIC) ionic liquid were studied by using square wave voltammetry, chronoamperometry and chronopoten-tiometry methods. The appropriate condition for electrodeposition of Co nanowires was determined. It was founded that Co nanowires could be obtained under ？0.65 V and Co electrodeposition on W electrode at intial stage followed the instantaneous nucleation model controlled by difussion and 3D growth process. Meanwhile, the stability of this ionic liquid in the air was investigated and the results indicated that CoCl2-EMIC can be saved for 96 h without absorbing water. Moreover, the ionic liquids saved in the air were used for electrodeposition and Co nanowires can be obtained.
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