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首页> 外文会议>International Symposium on Energy and Electrochemical Processes for a Cleaner Environment, 2001, San Francisco, CA >DEVELOPMENT OF A HIGHLY DURABLE IrO_2-BASED ANODE TO CATHODIZING-INDUCED DETERIORATION
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DEVELOPMENT OF A HIGHLY DURABLE IrO_2-BASED ANODE TO CATHODIZING-INDUCED DETERIORATION

机译：一种高耐用性的基于IrO_2的阳极，用于阴极诱导的降解

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摘要

The lifetime of an IrO_2-Ta_2O_5 coated titanium anode in sulfuric acid solutions is shorten by periodic cathodizing which often happens in a commercial electrogalvanizing line having no edge mask. In order to diminish this cathodizing-induced deterioration, the effects of thermal decomposition temperature of IrO_2-Ta_2O_5 catalytic layer on the anode's lifetime were investigated. The lifetimes of the anodes prepared at different thermal decomposition temperatures between 743 K and 1023 K were examined for continuous anodic and periodically reversed (PR) electrolyses. The effects of thermal decomposition temperature on the surface morphology and crystallographic structure of the catalytic layers were compared by using SEM and XRD. The results indicated that the durability of the IrO_2-Ta_2O_5/Ti anode during PR electrolysis was more improved when thermal decomposition temperature raised up to 973 K, while the lifetime during continuous anodic electrolysis decreased with increasing thermal decomposition temperature. The reasons why the increase in thermal decomposition temperature induces the different effects for the lifetimes during continuous anodic and PR electrolyses were discussed from the results on structural and compositional analyses of the catalytic layer.
机译：IrO_2-Ta_2O_5涂层的钛阳极在硫酸溶液中的寿命会通过周期性阴极化而缩短，这在没有边缘罩的商用电镀锌生产线中经常发生。为了减少这种由阴极引起的劣化，研究了IrO_2-Ta_2O_5催化层的热分解温度对阳极寿命的影响。检查了在743 K和1023 K之间的不同热分解温度下制备的阳极的寿命，以进行连续阳极电解和定期反向（PR）电解。用SEM和XRD比较了热分解温度对催化层表面形貌和晶体结构的影响。结果表明，当热分解温度升高至973 K时，IrO_2-Ta_2O_5 / Ti阳极在PR电解过程中的耐久性得到了改善，而连续阳极电解的寿命随着热分解温度的升高而降低。从催化层的结构和组成分析结果出发，讨论了热分解温度升高在连续阳极和PR电解过程中对寿命产生不同影响的原因。

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