A Highly Stable Ti/TiHx/Sb鈥揝nO2 Anode: Preparation, Characterization and Application

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• 作者：Dan Shao ; Wei Yan ; Xiaoliang Li ; Honghui Yang ; Hao Xu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：March 12, 2014
• 年：2014
• 卷：53
• 期：10
• 页码：3898-3907
• 全文大小：597K
• 年卷期：v.53,no.10(March 12, 2014)
• ISSN：1520-5045

文摘

Low service life limits the industrial application of the titanium-based Sb鈥揝nO₂ anode. To improve its stability, a titanium hydride interlayer is fabricated to construct a three-layer anode, Ti/TiH_x/Sb鈥揝nO₂. Titanium hydride was prepared by reducing precoated titanium oxide in aqueous solution via electrochemical process, and it acted as a binder between the Ti and Sb鈥揝nO₂ phases. Cyclic voltammetry, electrochemical impedance spectroscopy, and the accelerated lifetime test were also conducted to elucidate the positive effect of the TiH_x interlayer. Results show that Ti/TiH_x/Sb鈥揝nO₂ not only possesses better stability but has higher oxygen evolution potential and lower electron transfer resistance compared with Ti/Sb鈥揝nO₂. Essential characterizations were conducted including scanning electron microscopy, energy disperse spectroscopy, and X-ray diffraction. The mechanism of lifetime enhancement is also proposed. The performances of the electrodes on degrading three different organics manifest that the degradation performance of the electrode strongly relies on the electrode stability.