T.Y. Wang
金属学报(英文版)
Ir-Ta-Ti metal oxide coated titanium anodes prepared by thermal decomposition at aif-ferent calcination temperatures were characterized by scanning electron microscopy,cyclic voltammetry, and accelerated life test, while the consumption rate of an anodewas also measured in seawater. The SEM results indicate that all oxide layers ex-hibit a cracked-mud morphology influenced by calcination temperature. Voltammetriccharge (q*), obtained by integration of I-E curve, is proportional to the number oflayer. It is found that q* decreases linearly with the increase of calcination temper-ature, and reaches a maximum at 450℃. The anode prepared at 500℃ possesses thebest anodic stability and the longest service life in 1M H2SO4 at an anodic currentdensity of 2A/cra2. Owing to good corrosion resistance and low consumption rate inseawater, Ir-Ta-Ti metal oxide coated titanium anodes belong to insoluble materialwith excellent electracatalytic activity, which are outstanding candidates for using asanode in impressed current cathodic protection systems.
关键词:
anodic stability
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徐浩
,
李晶晶
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延卫
,
朱威
稀有金属材料与工程
采用电沉积法制备了4种钛基体PbO2电极,其中3种分别采用Fe、Ni和Ag进行掺杂.利用SEM、XRD、强化寿命测试及线性伏安扫描对所制备4种电极性质进行表征,结果表明:4种电极表面均为四方体形PbO2颗粒；非掺杂电极及Ni掺杂电极的平均颗粒直径非常接近,且要小于Fe掺杂及Ag掺杂电极;Fe掺杂电极的强化测试寿命最长(116 h),这可能是由其致密的表面所导致；Ni掺杂电极的析氧电位为4种电极中最高,并在苯酚降解实验中拥有最高的COD去除效率及平均电流效率,以及最低的能耗值.
关键词:
PbO2电极
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掺杂
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强化寿命
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析氧电位
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苯酚降解
