کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6472515 | 1424135 | 2016 | 8 صفحه PDF | دانلود رایگان |
Exchange current density (iâ) of thorium in LiCl-KCl eutectic at tungsten(inert) and liquid cadmium electrodes is reported in the present work. A cadmium electrode was designed in our laboratory for estimating iâ of thorium in liquid cadmium. Cyclic voltammetry of thorium at tungsten electrode was associated with a cathodic peak at â1.59Â V at 773Â K attributed to Th4+|Th redox couple. Cathodic peaks corresponding to Th4+|ThCd11 and Th4+|ThCd5 couples at â1.31Â V and â1.38Â V, respectively (at 773Â K) were observed in the cyclic voltammograms of thorium at liquid cadmium electrode. iâ of thorium in LiCl-KCl eutectic at tungsten electrode (cathodic polarization) estimated by Tafel and Allen-Hickling methods were compared with those estimated from the cyclic voltammograms of LiCl-KCl-ThCl4. iâ at tungsten electrode was found to be higher than that at liquid cadmium electrode. The temperature dependence of iâ was studied to estimate the activation energy associated with Th4+|Th couple at tungsten, liquid cadmium (cathodic polarization) and dissolution of thorium (anodic polarization). The compositional dependence of iâ of thorium at tungsten electrode was also addressed. This is the first report on the iâ of thorium in LiCl-KCl eutectic.
134 Figure 1: Tafel plots of anodic and cathodic polarization of thorium and inert and liquid cadmium cathode in LiCl-KCl eutectic.
Journal: Electrochimica Acta - Volume 222, 20 December 2016, Pages 92-99