Electrochemical oxidation of Rhodamine B on RuO₂-PdO-TiO₂/Ti electrode

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• 作者：Lin Du^a ; Jin Wu^b ; Changwei Hu^a ; ^{gchem@scu.edu.cn} ; ^{chwehu@mail.sc.cninfo.net}
• 关键词：RuO2&ndash ; PdO&ndash ; TiO2/Ti electrode ; Rhodamine B ; Metal elements
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：30 April, 2012
• 卷：68
• 期：Complete
• 页码：69-73
• 文件大小：367 K

摘要

A tricomponent electrode RuO₂-PdO-TiO₂/Ti was prepared and used in the electrochemical degradation of Rhodamine B. The electrode was characterized by XRD, XPS, linear-sweep voltammetry (LSV) and chronopotentiometry (CP) techniques. It was found that Ru⁴⁺ doped into the cell while Pd anchored with enriched concentration on the surface of TiO₂. In the presence of Ru and Pd, the binding energy of Ru increased, while the oxygen vacancies of TiO₂ decreased. This interaction of metals accordingly raised the oxygen evolution potential, decreased the chlorine evolution potential and enhanced the conductivity of the electrode. Therefore, the electrochemical ability of RuO₂-PdO-TiO₂/Ti anode was improved and Rhodamine B could be destructed effectively yielding a total organic carbon (TOC) removal of 71.70%within 30 min.