高温氯化物熔体氯电极过程的电催化作用  

ELECTROCATALYSIS FOR CHLORINE EVOLUTION REACTION IN CHLORIDE MEITS AT HIGH TEMPERATURE

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,长沙410083

出　　处：《金属学报》1999年第3期296-299,共4页Acta Metallurgica Sinica

基　　金：国家自然科学基金!59604005

摘　　要：以石墨为基底、采用热分解工艺制备氧化物涂层电极；用慢速线性电位扫描技术结合改进的断电流测试技术，对过渡族金属氧化物、镧系稀土氧化物及其复氧化物电极，在 ７００℃高温氯化物熔体中的析氯电催化性能进行测试结果发现，高温下Ｐｒ，Ｔｂ和Ｔｉｎ等一些稀土氧化物和复合氧化物对氯析出显示出高的催化活性；与石墨电极相比， ０．６Ａ／ｃｍ２的工业电流密度下可降低析氯过电位 ８０－１１０ ｍＶ，证实了高温氯电极过程存在电催化作用．依过电位降低的大小，实验获得镧系稀土氧化物析氯电催化活性的顺序为；Oxide electrodes were prepared by thermal decomposition procedure on graphite sub- straies. Linear potential sweep and improved current interruption technique were used to investigate the electrocatalytic activity of transition metal oxides, RE oxides and mixed chides in chloride melts at 700 ℃. Testing results demonstrated that some RE such as Pr, Tb, Tin oxides and (RE+Ru) mixed oxides show high active for CER and can lower anoclic overpotential up to 80-110 mV at a current density of 0.6 A/cm', compared with graphite electrode. The electrocatalytic behavior for CER at high temperature was revealed and the order of electrocatalytic activity of rare earth oxides according to their anodic overpotential reducing is shown as Pr>Tb>Tm>Dy>La>Yb>Nd.

关 键 词：CER 电催化 氯化物熔体 电极过程 电解冶金 

分 类 号：TF111.52[冶金工程—冶金物理化学] O646.54[理学—物理化学]