کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6472515 1424135 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Exchange current density of Th4+|Th couple in LiCl-KCl eutectic
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Exchange current density of Th4+|Th couple in LiCl-KCl eutectic
چکیده انگلیسی

Exchange current density (i∘) 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 i∘ of thorium in liquid cadmium. Cyclic voltammetry of thorium at tungsten electrode was associated with a cathodic peak at −1.59 V at 773 K attributed to Th4+|Th redox couple. Cathodic peaks corresponding to Th4+|ThCd11 and Th4+|ThCd5 couples at −1.31 V and −1.38 V, respectively (at 773 K) were observed in the cyclic voltammograms of thorium at liquid cadmium electrode. i∘ 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. i∘ at tungsten electrode was found to be higher than that at liquid cadmium electrode. The temperature dependence of i∘ 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 i∘ of thorium at tungsten electrode was also addressed. This is the first report on the i∘ 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 222, 20 December 2016, Pages 92-99
نویسندگان
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