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活性层制备方法对二氧化铅电极性能的影响

Effect of preparation method of active layer on properties of lead dioxide electrode
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摘要 分别采用电沉积法和热分解法制备了含SnO_2-Sb_2O_3中间层的钛基二氧化铅活性层。分别采用扫描电镜、X射线衍射、电化学测量、加速寿命试验等方法,对比研究了不同方法制备的二氧化铅活性层的晶体结构、表面形貌、电化学特性、降解有机污染物的能力和使用寿命。结果表明,热分解法制备的电极的析氧过电位低于电沉积电极,但具有较大的比表面积,所以在电催化氧化苯胺过程中显示出较高的降解能力;热分解制备的电极表面疏松多孔,而电沉积制备的电极表面致密,所以电沉积电极的使用寿命远远高于热分解电极。 Lead dioxide active layers were prepared with SnO2-Sb2O3 intermediate coating on titanium substrate by electrodeposition and thermal decomposition, respectively. The crystal structure, surface morphology, electrochemical property, organic pollutant degradability and service life of the electrodes with active layers prepared by different methods were comparatively studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), electrochemical analysis and accelerated life test. The results showed that the oxygen evolution overpotential of thermal decomposition-prepared electrode is lower than that of electrodeposition-prepared one, but the former has larger surface area, which made the former exhibit better degradability than the later during the electrocatalytic oxidation of aniline. The surface of thermal decomposition-prepared electrode is loose and porous, while the electrodeposition-prepared electrode has a compact surface and far longer service life.
出处 《电镀与涂饰》 CAS CSCD 北大核心 2016年第24期1281-1285,共5页 Electroplating & Finishing
基金 吉林省科技发展计划项目(2150520079JH) 吉林省教育厅"十三五"科学技术研究项目(吉教科合字[2016]第225号 第227号)
关键词 二氧化铅电极 电沉积 热分解 苯胺 电催化氧化 微观结构 使用寿命 lead dioxide electrode electrodeposition thermal decomposition aniline electrocatalytic oxidation microstructure service life
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