کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
194669 | 459797 | 2006 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The cathode process in sodium chloride melts containing sulphate The cathode process in sodium chloride melts containing sulphate](/preview/png/194669.png)
The effect of addition of sulphate to sodium chloride and sodium fluoride melts was investigated by chronopotentiometry in the temperature range 820–1000 °C. It was found that the numerical value of the chronopotentiometric term jτ1/2/c0 increased with increasing cathodic current density. This behaviour was explained by chemical decomposition of sodium sulphate into SO3 and Na2O, followed by electrochemical reduction of SO3. The decomposition of sodium sulphate is enhanced with increasing temperature, resulting in an increase in the chronopotentiometric transition time. Numerical simulation of this electrode process supports this explanation of the electrode process. It is not a classical so-called CE mechanism when a chemical reaction precedes the electrochemical reduction as described in the literature, because the formation of SO3 is suppressed by the presence of Na2O in the melt.
Journal: Electrochimica Acta - Volume 51, Issue 26, 15 August 2006, Pages 5825–5828