Kinetics process of Tb(III)/Tb couple at liquid Zn electrode and thermodynamic properties of Tb-Zn alloys formation

doi:10.1007/s11426-016-9007-0

	Kinetics process of Tb(III)/Tb couple at liquid Zn electrode and thermodynamic properties of Tb-Zn alloys formation
	Pang, JW; Liu, YL; Luo, LX; Shi WQ(石伟群); Chai ZF(柴之芳); Yuan LY(袁立永); Pang JW(庞敬雯); Liu K(刘奎); Liu YL(刘雅兰); Luo LX(罗利霞)
刊名	SCIENCE CHINA-CHEMISTRY中国科学. 化学
	2017
卷号	60 期号:6 页码:813-821
关键词	Tb liquid Zn electrode kinetic parameters thermodynamic properties molten salt
ISSN号	1674-7291
DOI	10.1007/s11426-016-9007-0
文献子类	Article
英文摘要	Electrochemical properties of rare-earth elements in the LiCl-KCl eutectic are important for the pyrometallurgical recycling process of spent nuclear fuels. In this work, the electrochemical properties of Tb (III)/Tb (0) couple were studied by the cyclic voltammetry (CV) at a liquid Zn pool electrode. The results showed that this electrochemical reaction is quasi-reversible with mixed reversible diffusion control and the charge transfer control. The diffusion coefficient of Tb (III) was determined to be in the order of similar to 10(-5)cm(2)s(-1). Moreover, kinetic parameters, such as the standard rate constants (k(s)) and charge transfer coefficient (a) for the electroreduction of Tb (III) to Tb (0) at the liquid Zn electrode, were calculated by the Nicholson method at 873 K. Additionally, it was found that Tb-Zn intermetallic compounds were easily to be formed in the measurements. Hence, the reduction process of Tb (III)/Tb (0) couple on the Zn-coated Mo electrode was also studied to obtain more information of the Tb-Zn intermetallic compounds. Electrochemical signals stemming from various intermetallic compounds associated with TbZn12, Tb2Zn17, Tb13Zn58, Tb3Zn11, TbZn3, TbZn2 and TbZn, were observed. The thermodynamic data were thereafter estimated by applying the emf method at 823-923 K. The standard formation Gibbs energies and the standard equilibrium constant of each Tb-Zn intermetallic compounds were also calculated. Finally, enthalpies and entropies of formation and the apparent standard potentials of various Tb-Zn intermetallic compounds were also obtained.
电子版国际标准刊号	1869-1870
WOS关键词	KCL EUTECTIC MELTS ; MOLTEN CHLORIDE SALT ; LICL-KCL ; ELECTROCHEMICAL-BEHAVIOR ; INTERMETALLIC COMPOUNDS ; PHASE-DIAGRAMS ; HO-ZN ; ER-ZN ; EXTRACTION ; ELECTROREDUCTION
WOS研究方向	Chemistry
语种	英语
CSCD记录号	CSCD:6006651
WOS记录号	WOS:000402071300020
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284967]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Pang, JW,Liu, YL,Luo, LX,et al. Kinetics process of Tb(III)/Tb couple at liquid Zn electrode and thermodynamic properties of Tb-Zn alloys formation[J]. SCIENCE CHINA-CHEMISTRY中国科学. 化学,2017,60(6):813-821.
APA	Pang, JW.,Liu, YL.,Luo, LX.,石伟群.,柴之芳.,...&Liu, K.(2017).Kinetics process of Tb(III)/Tb couple at liquid Zn electrode and thermodynamic properties of Tb-Zn alloys formation.SCIENCE CHINA-CHEMISTRY中国科学. 化学,60(6),813-821.
MLA	Pang, JW,et al."Kinetics process of Tb(III)/Tb couple at liquid Zn electrode and thermodynamic properties of Tb-Zn alloys formation".SCIENCE CHINA-CHEMISTRY中国科学. 化学 60.6(2017):813-821.