Electroreduction-based Tb extraction from Tb4O7 on different substrates: understanding Al-Tb alloy formation mechanism in LiCl-KCl melt
文献类型：期刊论文
| 作者 | Luo LX(罗丽霞); Liu YL(刘雅兰); Liu K(刘奎); Yuan LY(袁立永) ; Chai ZF(柴之芳); Shi WQ(石伟群); Luo, LX; Liu, YL; Liu, N; Liu, K
|
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2015 |
| 卷号 | 5期号:85页码:69134-69142 |
| 通讯作者 | 石伟群 |
| 英文摘要 | This work presents the electroreduction of Tb(III) ions, and formation mechanisms of Al-Tb alloys in molten chlorides by applying different types of cathodes: Mo, Al and Al-coated Mo. First, Tb(III) ions were successfully produced by the chlorination of Tb4O7 with AlCl3 in this work. Next, the mechanisms of electrode reactions were determined by various electrochemical techniques, such as cyclic voltammetry (CV), square wave voltammetry (SWV), chronopotentiometry (CP) and open circuit chronopotentiometry (OCP). On the Mo electrode, the reduction of Tb(III) to Tb(0) was determined to be reversible and a one-step process with three electrons exchanged, which was mainly controlled by the mass transport process of linear diffusion of Tb(III) in a chloride melt. In addition, the diffusion coefficient of Tb(III) was calculated to be (2.29 +/- 0.01) x 10(-5) cm(2) s(-1) by the Sand equation. According to electrochemical investigations, it was clear that Al-Tb alloy formation was feasible on both solid aluminum and Al-coated molybdenum electrodes. Three redox signals corresponding to the formation and dissolution of different kinds of Al-Tb intermetallic compounds were observed on the Al-coated Mo electrode, whereas only one redox signal was detected on the solid Al electrode. Finally, deposited Al-Tb alloy samples were prepared by potentiostatic electrolysis and characterized by scanning electronic microscopy coupled with energy dispersive spectrum (SEM-EDS) and X-ray diffraction (XRD). It was found that the intermetallic compound Al2Tb was formed by potentiostatic electrolysis at a potential of -1.6 V and at a temperature of 803 K. When the deposition temperature was elevated to 903 K, the intermetallic compound Al3Tb was then obtained by potentiostatic electrolysis. |
| 学科主题 | Chemistry |
| 类目[WOS] | Chemistry, Multidisciplinary |
| 收录类别 | SCI ; EI |
| WOS记录号 | WOS:000360069900009 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228661]  |
| 专题 | 高能物理研究所_院士 高能物理研究所_多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Luo LX,Liu YL,Liu K,et al. Electroreduction-based Tb extraction from Tb4O7 on different substrates: understanding Al-Tb alloy formation mechanism in LiCl-KCl melt[J]. RSC ADVANCES,2015,5(85):69134-69142. |
| APA | 罗丽霞.,刘雅兰.,刘奎.,袁立永.,柴之芳.,...&Shi, WQ.(2015).Electroreduction-based Tb extraction from Tb4O7 on different substrates: understanding Al-Tb alloy formation mechanism in LiCl-KCl melt.RSC ADVANCES,5(85),69134-69142. |
| MLA | 罗丽霞,et al."Electroreduction-based Tb extraction from Tb4O7 on different substrates: understanding Al-Tb alloy formation mechanism in LiCl-KCl melt".RSC ADVANCES 5.85(2015):69134-69142. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。