Electrochemical impedance spectroscopy investigation on indium tin oxide films under cathodic polarization in NaOH solution

被引：28

作者：

Gao Wenjiao ^{[1
]}

Cao Si ^{[1
]}

Yang Yanze ^{[1
]}

Wang Hao ^{[1
]}

Li Jin ^{[1
]}

Jiang Yiming ^{[1
]}

机构：

[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China

来源：

THIN SOLID FILMS | 2012年 / 520卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Corrosion; Electrochemical impedance spectroscopy; Indium tin oxide; Cathodic polarization; AZ91D MAGNESIUM ALLOY; MULTISTEP MECHANISMS; METHANOL OXIDATION; ITO FILMS; CORROSION; RESISTANCE; STABILITY; ELECTRODE; PLATINUM; COATINGS;

D O I：

10.1016/j.tsf.2012.07.092

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrochemical corrosion behaviors of indium tin oxide (ITO) films under the cathodic polarization in 0.1 M NaOH solution were investigated by electrochemical impedance spectroscopy. The as-received and the cathodically polarized ITO films were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction for morphological, compositional and structural studies. The results showed that ITO films underwent a corrosion process during the cathodic polarization and the main component of the corrosion products was body-centered cubic indium. The electrochemical impedance parameters were related to the effect of the cathodic polarization on the ITO specimens. The capacitance of ITO specimens increased, while the charge transfer resistance and the inductance decreased with the increase of the polarization time. The proposed mechanism indicated that the corrosion products (metallic indium) were firstly formed during the cathodic polarization and then absorbed on the surface of the ITO film. As the surface was gradually covered by indium particles, the corrosion process was suppressed. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：6916 / 6921

页数：6

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