In this study, we prepared Ti/IrO₂-ZrO₂ electrodes with different ZrO₂ contents using zirconium-n-butoxide (C₁₆H₃₆O₄Zr) and chloroiridic acid (H₂IrCl₆) via a sol-gel route. To explore the effect of ZrO₂ content on the surface properties and electrochemical behavior of electrodes, we performed physical characterizations and electrochemical measurements. The obtained results revealed that the binary oxide coating was composed of rutile IrO₂, amorphous ZrO₂, and an IrO₂-ZrO₂ solid solution. The IrO₂-ZrO₂ binary oxide coatings exhibited cracked structures with flat regions. A slight incorporation of ZrO₂ promoted the crystallization of the active component IrO₂. However, the crystallization of IrO₂ was hindered when the added ZrO₂ content was greater than 30at%. The appropriate incorporation of ZrO₂ enhanced the electrocatalytic performance of the pure IrO₂ coating. The Ti/70at%IrO₂-30at%ZrO₂ electrode, with its large active surface area, improved electrocatalytic activity, long service lifetime, and especially, lower cost, is the most effective for promoting oxygen evolution in sulfuric acid solution.

中文翻译：

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IrO 2 -ZrO 2二元氧化物涂层在硫酸溶液中促进氧气释放的电化学行为和耐蚀性

在本研究中，我们使用正丁酸锆（C ₁₆ H ₃₆ O ₄ Zr）和氯碘酸（H ₂ IrCl ₆）通过溶胶-凝胶法制备了具有不同ZrO ₂含量的Ti / IrO ₂ -ZrO ₂电极。为了探索ZrO ₂含量对电极表面性能和电化学行为的影响，我们进行了物理表征和电化学测量。所得结果表明，二元氧化物涂层由金红石型IrO ₂，非晶态ZrO ₂和IrO ₂ -ZrO ₂固溶体组成。IrO₂ -ZrO ₂二元氧化物涂层显示出具有平坦区域的破裂结构。ZrO _2的少量掺入促进了活性成分IrO ₂的结晶。然而，当添加的ZrO ₂含量大于30at％时，IrO ₂的结晶受到阻碍。适当掺入ZrO _2可以增强纯IrO ₂涂层的电催化性能。Ti / 70at％IrO ₂ -30at％ZrO ₂ 电极具有较大的活性表面积，改善的电催化活性，较长的使用寿命，尤其是较低的成本，是促进硫酸溶液中氧气释放的最有效方法。