添加纳米IrO_2的新型涂层IrO_2-Ta_2O_5钛阳极的制备及性能  

Preparation and performance of novel IrO_2-Ta_2O_5 coated titanium anode with embedded nanoscale IrO_2

作　　者：白少金[1] 魏宗平[1] 王欣[1] 邵艳群[1] 唐电[1] 

机构地区：[1]福州大学材料研究所,福州350108

出　　处：《中国有色金属学报》2011年第3期669-674,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2007AA03Z325);福建省自然科学基金资助项目(2009J05116)

摘　　要：以纳米IrO2晶粒部分取代H2IrCl6分散于前躯体溶液中,以此改进工艺制备一种Ir和Ta的摩尔比为7-3的IrO2-Ta2O5涂层钛阳极,通过XRD和SEM分析所制备钛阳极表面涂层的物相组成和形貌特征,采用析O2极化曲线、循环伏安和强化寿命测试方法分别研究电极的电催化性能与稳定性。结果表明:在纳米种子嵌入电极涂层中存在的物相分别为IrO2基固溶体(Ir,Ta)O2和IrO2;与采用传统方法制备的电极相比,含纳米种子嵌入结构涂层的钛阳极具有更优越的电催化活性和耐蚀性。An IrO2-Ta2O5/Ti anode coating with molar ratio of Ir to Ta of 7：3 on titanium was prepared by a modified technology,in which a portion of nano-crystalline of IrO2 was introduced to replace some amount of H2IrCl6 in the precursor solution.The phase structure and morphology of the coating were analyzed by X-ray diffractometry（XRD） and scanning electronic microscopy（SEM）,respectively.The electro-catalytic properties and electrochemical stability of the coating were also characterized by using O2 evolution polarization,cyclic voltammetry（CV） test and accelerating-life test,respectively.The results show that the crystallite phases of the nano-seeds embedded electrode coating are IrO2-based solid solution（Ir,Ta）O2 and IrO2 phase.In addition,the anodes with the nano-seeds embedded coatings exhibit better electro-catalytic activity and corrosion resistance compared with the IrO2-Ta2O5/Ti anodes prepared by the traditional method.

关 键 词：IrO2 TA2O5 钛阳极 纳米种子 电催化性能 

分 类 号：TG174[金属学及工艺—金属表面处理] TQ153[金属学及工艺—金属学]