嵌中间层金属氧化物电极  

Electrode of Metallic Oxides Coated Titanium with Interlayer

作　　者：唐益[1] 许立坤[1] 辛永磊[1] 王均涛[1] 龙萍 

机构地区：[1]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护国防科技重点实验室,山东青岛266071

出　　处：《电化学》2009年第2期146-151,共6页Journal of Electrochemistry

基　　金：国家"十一五"国防基础科研重点项目资助

摘　　要：采用溶胶-凝胶法制备Ti/IrRuSn、Ti/IrTa/IrRuSn和Ti/IrTaSn/IrRuSn氧化物电极,FESEM、XRD观察该电极微观结构,循环伏安、强化电解测试电极电化学性能.结果表明:嵌中间层氧化物电极表面裂纹增多,改变了颗粒形状和平均晶粒尺寸,虽电流效率略有降低,增多活性点,提高电极析氯反应选择性;但2种氧化物电极(Ti/IrTa/IrRuSn和Ti/IrTaSn/IrRuSn)的强化电解寿命和正反交替电解寿命均较好.Various Ti/IrRuSn, Ti/IrTa/IrRuSn and Ti/IrTaSn/IrRuSn oxide electrodes were prepared by solgel method. The surface morphology and microstructure were analysed with FESEM and XRD. The electrochemical activity and stability were investigated using electrochemical technologies including chlorine and oxygen evolving potential measurements, cyclic voltammetry, accelerated life test, and alternative electrolysis. The results indicate that the electrodes with interlayers present more cracks on the surface and a little bigger average grain size, with particles of different shapes precipitated in the cracks. The electroactive sites are increased and the selectivity for the chlorine evolving reaction is enhanced, but the current efficiency for the chlorine production is somewhat lowered by the addition of different interlayers. The stability characterised with accelerated life test and alternative electrolysis of Ti/IrTa/IrRuSn and Ti/IrTaSn/IrRuSn oxide electrodes is significantly higher than Ti/ IrRuSn oxide electrode without interlayers.

关 键 词：复合电极 电解海水 电流效率 微观结构 稳定性 

分 类 号：TG174.41[金属学及工艺—金属表面处理]