Electrodeposition of iridium from composite ionic liquid

被引：9
作者：
Qian, Jian-gang [1 ]
Yin, Ying [1 ]
Li, Xin [1 ]
Li, Tie-jun [1 ]
机构：
[1] Beihang Univ, Sch Chem & Environm, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2015年 / 25卷 / 05期
基金：
中国国家自然科学基金;
关键词：
composite ionic liquid; iridium; N; N-dimethylacetamide; electrodeposition; COATINGS;
D O I：
10.1016/S1003-6326(15)63773-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
In order to study the electrodeposition process of iridium in composite ionic liquid, the effects of N, N-dimethylacetamide (DMAC) on the viscosity, conductivity and electrochemical stability of composite ionic liquid BMIC-BMIBF4, as well as the electrochemical behavior of IrCl3 in this system were studied. Iridium (Ir) coatings were deposited at different constant potentials and characterized by SEM and XRD. The results show that the addition of DMAC can evidently decrease the viscosity of the composite system, increase conductivity and improve electrochemical stability of the composite system. Cyclic voltammograms of a Au electrode illustrate that the process controlled by diffusion rate is irreversible with the average charge transfer coefficient of 0.170 and average diffusion coefficient of 1.096x10(-6) cm(2)/s. In addition, SEM image shows that Ir film deposited at the reduction peak potential is dense and even, while XRD pattern shows that Ir deposit is polycrystalline structure.
引用
收藏
页码：1685 / 1691
页数：7
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