{"title":"The dropping gallium electrode in fused LiNO3-KNO3 eutectic","authors":"R.B. Escue, T.H. Tidwell, D.K. Dickie","doi":"10.1016/0022-0728(66)80042-6","DOIUrl":null,"url":null,"abstract":"<div><p>A study was made of the properties of the dropping gallium electrode (DGE) in fused LiNO<sub>3</sub>-KNO<sub>3</sub> eutectic at 180°, and the properties compared to those of the dropping mercury electrode (DME) at the same temperature in the same melt. A reduction wave at −0.4 V <em>vs</em>. Pt was noted on both gallium and mercury for a melt species which was probably NO<sub>2</sub>. No direct reduction of the many metal ions studied was observed on gallium. Pb(II) gave a reduction wave on gallium, but the wave diminished with time and disappeared in a few hours. The Heyrovsky-Ilkovic plot of the wave indicates that this is an enhanced NO<sub>2</sub> wave. The oxidizing properties of the melt seem to impair the usefulness of the gallium electrode in nitrate melts since gallium appears to become oxide-coated. This oxide layer may cause the metal-ion reduction potentials to be more negative than can be obtained in this melt.</p></div>","PeriodicalId":100778,"journal":{"name":"Journal of Electroanalytical Chemistry (1959)","volume":"12 3","pages":"Pages 220-224"},"PeriodicalIF":0.0000,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-0728(66)80042-6","citationCount":"7","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electroanalytical Chemistry (1959)","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0022072866800426","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2010/12/7 0:00:00","PubModel":"Epub","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 7
Abstract
A study was made of the properties of the dropping gallium electrode (DGE) in fused LiNO3-KNO3 eutectic at 180°, and the properties compared to those of the dropping mercury electrode (DME) at the same temperature in the same melt. A reduction wave at −0.4 V vs. Pt was noted on both gallium and mercury for a melt species which was probably NO2. No direct reduction of the many metal ions studied was observed on gallium. Pb(II) gave a reduction wave on gallium, but the wave diminished with time and disappeared in a few hours. The Heyrovsky-Ilkovic plot of the wave indicates that this is an enhanced NO2 wave. The oxidizing properties of the melt seem to impair the usefulness of the gallium electrode in nitrate melts since gallium appears to become oxide-coated. This oxide layer may cause the metal-ion reduction potentials to be more negative than can be obtained in this melt.
研究了180°熔接LiNO3-KNO3共晶中镓电极(DGE)的性能，并与相同熔体中相同温度下的汞电极(DME)的性能进行了比较。在- 0.4 V vs. Pt下，镓和汞的熔体都出现了还原波，熔体可能是NO2。在镓上没有观察到所研究的许多金属离子的直接还原。Pb(II)在镓上产生还原波，但随着时间的推移，还原波逐渐减弱，几小时后消失。该波的Heyrovsky-Ilkovic图表明这是一个增强的NO2波。熔体的氧化特性似乎削弱了镓电极在硝酸盐熔体中的用途，因为镓似乎被氧化了。该氧化层可能导致金属离子还原电位比在该熔体中获得的电位更负。
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