Electrochemical and Raman Spectroscopic Investigations on the Speciation and Behavior of Chromium Ions in Fluoride Doped Molten LiCl-KCl
文献类型：期刊论文
| 作者 | Zhu, TJ; Wang, CY; Fu, HY; Huang, W; Gong, Y |
| 刊名 | JOURNAL OF THE ELECTROCHEMICAL SOCIETY
 |
| 出版日期 | 2019 |
| 卷号 | 166期号:10页码:H463—H467 |
| 关键词 | 2ND COORDINATION SPHERE STANDARD RATE CONSTANTS CHARGE-TRANSFER REDOX COUPLE CHLORIDE ELECTRODEPOSITION ZIRCONIUM NIOBIUM HAFNIUM SYSTEM |
| ISSN号 | 0013-4651 |
| DOI | 10.1149/2.1221910jes |
| 文献子类 | 期刊论文 |
| 英文摘要 | The speciation and behavior of chromium ions in LiCl-KCl-CrF3 and LiCl-KCl-LiF-CrF3 melts were investigated by using cyclic voltammetry, square wave voltammetry, chronopotentiometry and Raman spectroscopy. Electrochemical reduction of Cr(III) to Cr(0) in LiCl-KCl-CrF3 is a two-step process mediated by the formation of Cr(II). Most Cr(III) ions exist in the form of CrCl6 3-while CrCl6-xFx3-(x <= 3) ions areminor in themolten salt medium. Based on the cyclic voltammetric results obtained at different potential scanning rates, the diffusion coefficients of Cr(III) and Cr(II) in LiCl-KCl-CrF3 melt were determined between 723 and 873 K, and their dependence on temperature can be described as lnD(Cr(III)) =-4.90-4322.66/T and lnD(Cr(II)) =-4.71-4007.09/T respectively. The diffusion coefficients of chromium ions in LiCl-KCl-CrF3 are higher than those in LiCl-KCl-CrCl3, which can be explained by the hopping mechanism. In addition, a series of apparent standard potentials of the Cr(III)/Cr(II) and Cr(II)/Cr(0) couples were obtained over the same temperature range using the open-circuit chronopotentiometry technique. With the addition of LiF into the LiCl-KCl-CrF3 mixture, the dominant chromium species change from CrCl63- to CrCl6-xFx3- (x = 6), which is supported by the appearance of the new peaks in both square wave voltammograms and Raman spectra. (c) 2019 The Electrochemical Society. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31587]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Dept Radiochem, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China; 2.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, TJ,Wang, CY,Fu, HY,et al. Electrochemical and Raman Spectroscopic Investigations on the Speciation and Behavior of Chromium Ions in Fluoride Doped Molten LiCl-KCl[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2019,166(10):H463—H467. |
| APA | Zhu, TJ,Wang, CY,Fu, HY,Huang, W,&Gong, Y.(2019).Electrochemical and Raman Spectroscopic Investigations on the Speciation and Behavior of Chromium Ions in Fluoride Doped Molten LiCl-KCl.JOURNAL OF THE ELECTROCHEMICAL SOCIETY,166(10),H463—H467. |
| MLA | Zhu, TJ,et al."Electrochemical and Raman Spectroscopic Investigations on the Speciation and Behavior of Chromium Ions in Fluoride Doped Molten LiCl-KCl".JOURNAL OF THE ELECTROCHEMICAL SOCIETY 166.10(2019):H463—H467. |
入库方式： OAI收割
来源：上海应用物理研究所
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