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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
1998年第4期668-672,共5页
The Chinese Journal of Nonferrous Metals
关键词
参比电极
氯化物融体
融盐
电化学
reference electrode chloride melts molten salts electrolysis
