涂覆厚度对Ru-Ir-Ti氧化物阳极涂层电化学性能的影响

Effect of Painting Thickness on the Electrochemical Characteristics of

摘要:

通过热分解法制备了不同涂覆层数的Ru-Ir-Ti氧化物阳极涂层。采用物理分析和电化学测试技术研究了不同涂覆层数氧化物阳极涂层的表面形貌、结构和电化学性能。结果表明，Ru-Ir-Ti氧化物阳极涂层涂覆30层 (15.55 μm) 时，涂层与钛基体结合牢固，具有较好的电催化选择性。此时，析氧电位达到1.52 V，析氯电位为1.02 V，电流效率高达94.5%，伏安电量达到35 mC/cm2，强化电解寿命长达525 h。当涂覆层数达到40层 (22.6 μm) 后，涂层呈疏松结构，表面粗糙，裂缝变得宽而深，涂层出现脱落，附着力下降

Abstract:

Anodic coatings of the oxides of Ru-Ir-Ti with different layer numbers were prepared by a pyrolysis method. The anodic coatings’ electrochemical characteristics were studied by electrochemical methods. The surface topography and the microstructure of the coatings were also studied. The results show that when the Ru-Ir-Ti oxide coating is coated with 30 layers (15.55 μm), it has better adhesive force and better catalytic selectivity. Meanwhile, the coating’s chlorine evolution potential, oxygen evolution potential and current efficiency are 1.02 V, 1.52 V and 94.5%, respectively. At the same time, the coating’s cyclic voltammetry charge is up to 35 mC/cm2 and its accelerated durability is about 525 h. When the coating layer number reaches up to 40 (22.6 μm), the anodic coating has rough surface and poor binding force and the cracks on the coating surface become deeper and wider