摘要
在773 K条件下,以Li Cl-KCl-LaCl_3为体系,运用常规脉冲伏安法检测了不同La Cl3含量时La^(3+)的浓度。研究结果表明,以Ag/Ag Cl为参比电极时,La^(3+)在钨电极上曲线出现的稳定电流平台对应电位在-2. 0 V～-2. 35 V之间。计算了La Cl3含量为0. 91%、1. 95%、2. 72%时熔盐体系中的La^(3+)扩散系数。由常规脉冲伏安法测出熔盐体系下的离子浓度分别为6. 671×10-5mol/cm3、1. 124×10-4mol/cm3、2. 041×10-4mol/cm3,与实验后进行ICP测试的离子浓度值对比,相对误差分别为4. 36%、6. 26%、1. 59%。
The normal pulse voltammetry in Li Cl-KCl-LaCl3 system was used to detect the La3+concentration at different contents under 773 K. The results show that the corresponding potential of the stable current platform of La3+on the tungsten electrode with Ag/Ag Cl as reference electrode was between-2. 0 V ^-2. 2 V. The La3+diffusion coefficients in the molten salt system with La Cl3 content of 0. 91%,1. 95% and 2. 72% were calculated. The ion concentration in the molten salt system was measured by normal pulse voltammetry,which was 6. 671 × 10-5 mol/cm3,1. 124×10-4 mol/cm3 and 2. 041 × 10-4 mol/cm3 respectively,and the relative error of ion concentration compared with the ICP test was 4. 36%. 6. 26% and 1. 59%.
作者
杨凤丽
王昭文
杨少华
田亚斌
叶昌美
李林山
YANG Feng-li;WANG Zhao-wen;YANG Shao-hua;TIAN Ya-bin;YE Chang-mei;LI Lin-shan(School of Metallurgy and Chemistry Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)
出处
《稀土》
EI
CAS
CSCD
北大核心
2019年第1期36-42,共7页
Chinese Rare Earths
基金
国家自然科学基金项目(51664022)
江西省普通本科高校中青年教师发展计划访问学者专项基金(赣教办函[2016]109号)
关键词
熔盐电化学
常规脉冲伏安法
离子浓度
LA
高温熔盐
eutectic electrochemisty
normal pulse voltammetry
ion concentration
lanthanum
high temperatureeutectic
