Use of square wave voltammeter for online monitoring of O2- concentration in molten fluorides at 600°C
Use of square wave voltammeter for online monitoring of O2- concentration in molten fluorides at 600°C
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利用方波伏安计在线监测600℃熔融氟化物中O2·浓度
DOI：
10.1016/j.jelechem.2015.04.023
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发表时间：
2015-07-01
影响因子：
4.5
通讯作者：
Xie, Leidong
中科院分区：
文献类型：
--
作者：
Shen, Miao;Peng, Hao;Xie, Leidong
采用LECO氧检测器和离子色谱法分别测定了FLINAK熔体中氧化物和含氧阴离子的总浓度。通过从氧化物的总浓度中减去含氧阴离子中的氧化物浓度来测量实际O2-浓度。采用方波伏安法（SWV）测定了600 ℃下FLINAK熔体中O2-的电化学行为，结果表明O2-氧化为氧气的过程受扩散控制。建立了O2-浓度与峰电流密度的定量关系。通过SWV测得ZrO 2的溶度积为（5.532-6.327）× 10（-7）mol（2）/kg（3）。(C)2015 Elsevier B. V.版权所有。
The total concentrations of oxide and oxygenated anions in FLINAK melts were detected by using LECO oxygen detector and ion chromatography, respectively. The practical O2- concentration was measured by subtracting the concentration of oxide in oxygenated anions from the total concentration of oxide. Square wave voltammeter (SWV) was then applied to determine the electrochemical behavior of O2- in FLINAK melts at 600 degrees C, which revealed that the process of oxidation from O2- to oxygen was controlled by diffusion. The quantitative relation between O2- concentration and peak current density was also established. The solubility product of ZrO2 was measured as (5.532-6.327) x 10(-7) mol(2)/kg(3) through SWV. (C) 2015 Elsevier B.V. All rights reserved.