摘要
以钛纳米管阵列(TNTs)为模板,通过热分解法制备IrO_2/TNTs/Ti阳极。采用扫描电镜(SEM)对电极的表面及截面形貌进行分析。通过线性扫描伏安曲线研究电极在三价铬电镀液中的阳极行为,并探究不同热处理温度制备的阳极在不同电流密度下的镀铬电流效率。结果显示,所制阳极表面无裂纹且规整。在镀铬应用中,与传统的石墨电极相比,IrO_2/TNTs/Ti阳极对三价铬的氧化电位明显正移,更有利于析氧反应,阴极电流效率可达到18%。
TiO2 nanotube arrays （TNTs） were used as template to prepare IrO2/TNTs/Ti anode by thermal decomposition method. The surface and cross-section morphologies of the anode were characterized by scanning electron microscopy （SEM）. The anodic polarization behavior of the electrode in trivalent chromium plating bath was studied by linear sweep voltammetry. The cathodic current efficiencies under different current densities in chromium plating for the anodes prepared at different heat treatment temperatures were examined. The results showed that the anode prepared is well- structured and free of cracks. In the application of trivalent chromium plating, the IrOE/TNTs/Ti anode exhibits a more positive oxidation potential as compared with the conventional graphite anode, facilitating the oxygen evolution reaction and having a cathodic current efficiency up to 18%.
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2017年第3期137-141,共5页
Electroplating & Finishing
关键词
钛纳米管阵列
氧化铱
阳极
热处理
三价铬电镀
形貌
电化学
阴极电流效率
titania nanotube array
iridium oxide
anode
heat treatment
trivalent chromium plating
morphology
electrochemistry
cathodic current efficiency
