高温析氯电催化剂用稀土氧化物的性能  

Properties of Rare Earth Oxides as Electrocatalysts for Chlorine Evolution in NaCl-KCl Smelts at 700 ℃

作　　者：谢中[1] 刘业翔[1] 

机构地区：[1]中南工业大学有色冶金系,湖南长沙410083

出　　处：《中国稀土学报》2000年第1期31-34,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金! ( 960 4 0 0 5)资助项目

摘　　要：采用热分解工艺制备稀土氧化物电极 ,研究了涂液组分、热分解温度及涂刷次数等对涂层电极性能的影响。对多种稀土化合物电极在70 0℃高温NaCl KCl( 1∶1 ,摩尔比 )熔体中的阳极析氯极化曲线测定结果表明 ,0 6A·cm- 2 的电流密度下 ,一些稀土氧化物可降低析氯过电位50～ 1 1 0mV。多次重复试验的误差小于 3 0mV。另外还从稀土氧化物能带结构的角度对其高温析氯电催化活性进行了解释。The RE oxide and mixed oxide electrodes were prepared by thermal decomposition procedure. The effects of precursor, decomposition temperature and coating times on oxide properties were studied. The results from the measurements of polarization curves on various RE compounds in equi molar NaCl KCl smelts at 700 ℃ show that some RE oxide electrodes can lower anodic overpotential by 50～110 mV at an industrial current density of 0 6 A·cm -2 . The repeated experimental errors are less than 30 mV. The electrocatalysis behavior of RE compounds for chlorine evolution reaction at high temperature is explained from the viewpoint of semiconductor energy band structure.

关 键 词：氧化物电极 电催化 稀土元素 高温析氯 催化剂 

分 类 号：O614.33[理学—无机化学] O643.36[理学—化学]