A Highly Stable Ti/TiHx/Sb-SnO2 Anode: Preparation, Characterization and Application

Low service life limits the industrial application of the titanium-based Sb-SnO2 anode. To improve its stability, a titanium hydride interlayer is fabricated to construct a three-layer anode, Ti/TiHx/Sb-SnO2. 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-SnO2 phases. Cyclic voltammetry, electrochemical impedance spectroscopy, and the accelerated lifetime test were also conducted to elucidate the positive effect of the TiHx interlayer. Results show that Ti/TiHx/Sb-SnO2 not only possesses better stability but has higher oxygen evolution potential and lower electron transfer resistance compared with Ti/Sb-SnO2. 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.