标题: Fundamentals of liquid metal displacement reactions: Emf measurements of Na-Sn, Li-Sn, Mg-Sn, and Ca-Sn

作者: Guo, L (Guo, Lei); Gao, SB (Gao, Shuaibo); Zhang, Y (Zhang, Yu); Li, WM (Li, Wenmiao); Du, KF (Du, Kaifa); Yin, HY (Yin, Huayi); Wang, DH (Wang, Dihua)

来源出版物JOURNAL OF ELECTROANALYTICAL CHEMISTRY卷: 945文献编号：117669 DOI: 10.1016/j.jelechem.2023.117669出版时间: SEP 15 2023

摘要: The driving force of spontaneous displacement reactions between Na-Sn alloys and molten LiCl, MgCl2, and CaCl2 salts stems from the difference of chemical potential between Na and Li, Mg, or Ca in liquid Sn. However, fundamental thermodynamic data are absent. Herein, electromotive force (emf) values of Na-Sn, Li-Sn, Mg-Sn, and Ca-Sn alloys (electrodeposition of Na, Li, Mg, and Ca in liquid Sn via the coulometric titration) were measured in NaF-NaCl-NaI, LiF-LiCl, MgCl2-NaCl-KCl, and CaCl2-LiCl-NaCl salts respectively at 650 degrees C. The measured emf values of these alloys were normalized with respect to the Cl /Cl2 potential that  3.14 V to  3.35 V for Na-Sn (mole fractions xNa = 0.02-0.30) alloy,  2.90 V to  3.21 V for Li-Sn (xLi = 0.02-0.30) alloy,  2.38 V to  2.45 V for Mg-Sn (xMg = 0.01-0.15) alloy, and  2.90 V to  3.06 V for Ca-Sn (xCa = 0.01-0.15) alloy. And Li20Sn, Mg10Sn, and Ca10Sn alloys were successful prepared by displacement reactions between Na20Sn alloys and LiCl-NaCl, MgCl2-NaCl, and CaCl2-NaCl salts, which offers theoretical guidelines for s-block elements extraction and separation.

Author Keywords: Molten salt; Electromotive force measurement; Liquid alloy; Displacement; Driving force

地址: [Guo, Lei; Gao, Shuaibo; Li, Wenmiao; Du, Kaifa; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Zhang, Yu] China Inst Atom Energy, Dept Radiochem, Beijing 102413, Peoples R China.

[Guo, Lei; Gao, Shuaibo; Li, Wenmiao; Du, Kaifa; Yin, Huayi; Wang, Dihua] Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

[Yin, Huayi; Wang, Dihua] Wuhan Univ, Joint Ctr Green Mfg Energy Storage Mat, Wuhan 430072, Peoples R China.

[Yin, Huayi; Wang, Dihua] Chilwee, Wuhan 430072, Peoples R China.

通讯作者: Yin, HY (corresponding author), Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

Yin, HY (corresponding author), Wuhan Univ, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

Yin, HY (corresponding author), Wuhan Univ, Joint Ctr Green Mfg Energy Storage Mat, Wuhan 430072, Peoples R China.

Yin, HY (corresponding author), Chilwee, Wuhan 430072, Peoples R China.

电子邮箱:yinhuayi@whu.edu.cn

影响因子：4.5