高温氯化物熔体参比电极  

REFERENCE ELECTRODE FOR ELECTROCHEMICALSTUDIES IN FUSED CHLORIDE

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

出　　处：《中国有色金属学报》1998年第4期668-672,共5页The Chinese Journal of Nonferrous Metals

摘　　要：在等摩尔的ＫＣｌ和ＮａＣｌ熔体中研究了Ａｇ／ＡｇＣｌ、金属Ｐｔ丝和石墨等参比电极的性能。Ａｇ／Ａｇ＋半电池置于带侧部支管一端封闭的石英管内，分别以石棉、惰性石墨和Ｐｔ作为隔膜盐桥；金属Ｐｔ丝和光谱纯石墨外套石英管直接插入熔体。实验测试结果表明石墨或Ｐｔ作盐桥可有效地防止熔体混熔，所制备的Ａｇ／ＡｇＣｌ参比电极具有不对称电势小、稳定性和互换性好等优点，是高温氯化物熔体电化学研究用理想的可逆参比电极；裸Ｐｔ丝和石墨棒在高温氯化物熔体中具有良好的长期稳定性。The behaviors of Ag/AgCl(10%), Pt wire and graphite rod in fused equimolar NaCl KCl as reference electrodes were investigated at 700 ℃. Quartz glass is served to isolate the electrode compartment of Ag/AgCl half cell, with graphite or Pt to maintain electrolytic contact. The bare Pt and graphite rod were immersed in chloride melt directly. The testing result showed that the Ag/AgCl electrode is well electrochemically reversible and reproducible, with asymmetrical potential less than 5 mV over a period of 6～8 h. It can be employed as a convenient and stable reversible reference electrode. The Pt wire and graphite rod dipped in melt can keep steady electrode potential for more than 12 hours, but show electrochemically irreversible; both of them can be used as pseudo reference electrodes for the study of electrode reaction kinetics as their simpliness, convenience and easy operation.

关 键 词：参比电极 氯化物融体 融盐 电化学 

分 类 号：O646.5[理学—物理化学] TF111.522[理学—化学]