Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第8卷    第4期    总第29期    1998年12月

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文章编号:(1998)04-668-5
高温氯化物熔体参比电极
谢    中     刘业翔

(中南工业大学有色冶金系, 长沙 410083)

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,是高温氯化物熔体电极过程动力学研究中简单实用的准参比电极。

 

关键字:     参比电极     氯化物融体    融盐电化学

REFERENCE ELECTRODE FOR ELECTROCHEMICAL STUDIES IN FUSED CHLORIDE
Xie Zhong and Liu Yexiang

Department of Nonferrous Metallurgy,Central South University of Technology, Changsha 410083, P. R. China

Abstract: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.

 

Key words:     reference electrode    chloride melts     molten salts electrolysis

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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