Preparation and characterization of TiO2-NTs/SnO2-Sb electrodes by electrodeposition |
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| Authors: | Yong Chen Lei HongHongmin Xue Weiqing HanXiuyun Sun Jiansheng Li |
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| Affiliation: | School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu Province, China |
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| Abstract: | ![]()
The novel Sb-doped SnO2 electrodes (TiO2-NTs/SnO2-Sb) have been prepared by anodization, electrodeposition and annealing. TiO2 nanotubes (TiO2-NTs) after Sb and Sn electrodeposited were characterized using field-emission scanning electron microscopy (FE-SEM). In contrast with the traditional Sb-doped SnO2 coating prepared by thermal decomposition, the Sb-doped SnO2 coating prepared by electrodeposition processes show more compact. X-ray diffraction (XRD) analysis indicates that the Sb-doped SnO2 coating prepared by electrodeposition processes are firmly combined with the TiO2-NTs formed on the Ti substrate. Accelerated service life tests reveal that the electrodeposition processes enhance the electrochemical stability of the Sb-doped SnO2 electrode. The cyclic voltammetry analysis shows that TiO2-NTs/SnO2-Sb electrodes have higher overpotential for oxygen evolution and higher electrochemical porosity. Besides, the enhanced stabilization mechanism of the TiO2-NTs/SnO2-Sb electrode prepared by electrodeposition processes has been studied. |
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| Keywords: | TiO2-NTs/SnO2-Sb electrode Electrodeposition Electrochemical stability Electrochemical porosity Stabilization mechanism |
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