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Electrochemical properties of yttrium on W and Pb electrodes in LiCl-KCl eutectic melts

机译:钇对LiCl-KCL共晶熔体W和Pb电极的电化学性质

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Cyclic voltammetry, square wave voltammetry, linear polarization, chronopotentiometry and chronoamperometry were performed to investigate the electrochemical properties of Y(iii) on W and Pb electrodes in LiCl-KCl eutectic melts. The diffusion coefficient of Y(iii) measured by various techniques was in the order of 10(-5). The nucleation of Y on W electrode was found to comply with the instantaneous nucleation mechanism. With increasing temperature, the exchange current densities increased and the charge-transfer resistances decreased, and exchange current densities are distinctly larger on liquid Pb electrode compared with W electrode. In addition, the co-deposition mechanism of Y(iii) and Pb(ii) on W electrode was also studied and four Pb-Y intermetallics could be detected. The feasibility of extraction metallic Y from the melts was explored by co-deposition on W electrode and under-potential deposition on liquid Pb electrode and the extracted products consisted of Pb3Y and Pb phases.
机译:进行循环伏安法,方波伏安法,线性偏振,计时表和计时率,以研究LiCl-KCl共晶熔体中W和Pb电极的Y(III)的电化学性质。通过各种技术测量的Y(III)的扩散系数为10(-5)。发现Y在W电极上的成核符合瞬时成核机制。随着温度的增加,与W电极相比,交换电流密度增加,电荷转移电阻降低,并且在液体Pb电极上明显较大。另外,还研究了W电极上的Y(III)和Pb(II)的共沉积机制,并且可以检测到四种PB-Y金属间质。通过在W电极上沉积并在液体PB电极上的电极和电位下沉积,萃取产物由PB3Y和Pb阶段组成的萃取金属Y的可行性。

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    《RSC Advances》 |2019年第46期|共11页
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  • 正文语种 eng
  • 中图分类 化学;
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