Ni/Ni^(2+)参比电极的研究及其应用

A NEW Ni/Ni(Ⅱ) REFERENCE ELECTRODEAND ITS APPLICATION IN FLUORIDE MELTS

用Al_2O_3隔膜制成Ni/Ni^(2+)参比电极,其性能稳定,重现性和电化学可逆性良好。在860—960℃的氟化物熔盐中的使用寿命约为20h。利用此参比电极研究了氟化物熔盐中钇离子的电化学还原机理,得出钇离子在铂电极上的还原是一步完成的不可逆过程。

The reference electrode, Ni | NiF_2(0.5 mol%), NaF-KF (1/1 mol) || Al_2O_3 function, has been developed for the electrochemical investigation in fluoride melts. Its stability, reproducibility and reversibility are satisfied between 860 and 960℃. The average life-span is about 20h in fluoride melts. The electrochemical behaviours of Y(Ⅲ) on Pt electrode in fluoride melts have been studied by use of the Ni/Ni(Ⅱ) reference electrode. The experimental results show that the reduction of Y(Ⅲ) on Pt electrode is an irreversible process.