Preparation and properties of PbO₂-ZrO₂ nanocomposite electrodes by pulse electrodeposition

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• 作者：Yingwu Yao ; Manman Zhao ; Chunmei Zhao ; Haijun Zhang
• 关键词：Pulse electrodeposition ; PbO2-ZrO2 nanocomposite electrodes ; Stability ; Electrocatalytic degradation.
• 刊名：Electrochimica Acta
• 出版年：20 January, 2014
• 年：2014
• 卷：117
• 期：Complete
• 页码：453-459
• 全文大小：1571 K

文摘

PbO₂-ZrO₂ nanocomposite electrodes were prepared by pulse electrodeposition in the lead nitrate plating bath containing ZrO₂ nanoparticles. The effect of pulse electrodeposition parameters, such as pulse frequency, average current density and duty cycle, on the ZrO₂ weight percentage in the PbO₂-ZrO₂ nanocomposite electrodes was investigated. The SEM and XRD tests show that PbO₂-ZrO₂ nanocomposite electrodes possess finer grain size than PbO₂ electrodes. The service life of PbO₂-ZrO₂ nanocomposite electrodes reaches 298 h which is 4 times longer than that of PbO₂ electrodes. The electrochemical measurements show that PbO₂-ZrO₂ nanocomposite electrodes possess higher oxygen evolution overpotential and larger active surface area than PbO₂ electrodes. The electrocatalytic property of PbO₂-ZrO₂ nanocomposite electrodes was also examined for the electrochemical oxidation of rhodamine B (RhB) and good fitting was found using the relation for the pseudo-first order reaction. The bulk electrolysis shows that the PbO₂-ZrO₂ nanocomposite electrodes exhibit the higher RhB and COD removal efficiency than PbO₂ electrodes.