以纳米TiN粉体和氯铱酸的混合液为涂液,采用浸渍一热分解法制备了含IrOx-TiO2中间层的钛基氧化铱电极.研究了IrOx-TiO2中间层对钛基氧化铱电极的显微结构及析氧寿命的影响.结果表明,TiN作为前驱体氧化生成金红石相的二氧化钛与氧化铱形成固溶体,并与钛基体形成了共格界面,从而构成了铱钛复合氧化物中间层,中间层的加入没有改变传统钛基氧化铱电极的基本形貌特征和组成,因而具有相同的电催化响应特性;由于中间层中二氧化钛的固溶和与钛基体的共格结合起到机械和化学的双重作用,电极的析氧寿命明显延长,从而通过实验手段证明了氧化铱电极失效的主要机制是由于钛基界面的劣化引起的.
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