摘要
钛基体涂覆铱钽氧化物阳极制备过程中对基体喷砂并进行不同时间的草酸浸蚀.环境扫描电镜、析氧极化曲线、电化学阻抗谱测试表明,草酸对钛基体的腐蚀速度及涂层载量(Ir含量)随腐蚀时间的延长先增大后减小.经过适当时间酸蚀处理后的基体上制备的氧化物阳极均匀致密,其电化学活性表面积大,析氧电催化活性提高,并具有较长的使用寿命.
IrO2-Ta2O5 oxide anode was prepared by coating oxide on titanium substrate which has been pretreated by sandblast and oxalic acid etching. ESEM, polarization curve and EIS indicated that the corrosion rate of the substrate and the loading of the oxide coating (i.e. Ir content) increase with etching time at the initial stage and then decrease. The oxide coating on the substrate pretreated by suitable etching pretreatment is of a uniform and compact surface which has large electrochemical active surface area, fine electrocatalytic activity for oxygen evolution and high stability.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第7期763-768,共6页
Acta Metallurgica Sinica
基金
青岛市科技发展计划资助项目04-2-GX-03
关键词
氧化物阳极
浸蚀
草酸
电催化活性
oxide anode
etching
oxalic acid
electrocatalytic activity
