溶胶-凝胶法制备Ru-Ir-Ti/Ti阳极涂层及性能研究

Preparation and Performance of Ru-Ir-Ti/Ti Electrode Coating by Sol-gel Process

摘要:

应用溶胶-凝胶法制备Ru-Ir-Ti/Ti氧化物阳极涂层。SEM、XRD、电子探针、极化曲线、电流效率实验表明，由溶胶-凝胶法制备的氧化物涂层比热分解法制备的氧化物涂层的分散性好、形成固溶体充分、电流效率高；由溶胶-凝胶法制备的氧化物涂层的失效是由于生成不导电的TiO2引起，而由热分解法制备的氧化物涂层的失效是由于活性氧化物涂层的溶解引起。

Abstract:

Sol-gel process is used to prepare Ru-Ir-Ti/Ti electrode coating. The microstructure and morphology are examined by SEM, XRD, EPMA, and the electrochemical performance is studied by potentiodynamic polarization and current efficiency. The results show that the alloy elements in the electrode coating prepared by the sol-gel process are well distributed, more sufficient to form solid solution and with higher current efficiency than by the traditional thermal decomposition process. The deactivation effect is due to the forming of unconductive TiO2 for the sol-gel process, but due to the dissolution of active composition for the thermal decomposition process.