Abstract
Novel two-stage pulse electrodeposition was used to fabricate TiO2-NTs@Sb-SnO2 electrodes. At the first pulse stage, a compact Sb-SnO2-coating TiO2-NTs interlayer was realized; at the second, various morphologies of apparent layers including flower-like, hierarchical, and dendritic morphologies were realized through regulating pulse parameters. Morphology-dependent electrode activities were investigated. Electrochemical experiment results show that dendritic-morphology electrode has the lowest charge transfer impedance (27.5 Ω vs. 43.2, 38.1, and 37.5 Ω) in comparison with other electrodes, and chronopotentiometry tests show a higher accelerated service lifetime of dendritic electrode (23 h vs. 17.8, 17.4, and 13.9 h), indicating the optimal electrochemical activity. The electrocatalytic methyl orange decolorization processes show that dendritic electrode possesses a higher first-order kinetics rate constant than other two electrodes (51.7 × 10−3 min−1 vs. 32.5 × 10−3, 39.7 × 10−3, and 35.5 × 10−3 min−1). These results demonstrate that the dendritic electrode possesses the most efficient catalytic performance.
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The project was supported by High-technology Ship Research Project of the Ministry of Industry and Information Technology of China.
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Duan, T., Ma, L., Chen, Y. et al. Morphology-dependent activities of TiO2-NTs@Sb-SnO2 electrodes for efficient electrocatalytic methyl orange decolorization. J Solid State Electrochem 22, 1871–1879 (2018). https://doi.org/10.1007/s10008-018-3895-1
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DOI: https://doi.org/10.1007/s10008-018-3895-1