物理化学学报Issue(2)：309-314,6.DOI:10.3866/PKU.WHXB201412182
Dy（III）离子在LiCl-KCl熔盐中的电化学行为及Dy-Ni金属间化合物的选择性制备
Electrochemical Behavior of Dy(III) and the Selective Formation of Dy-Ni Intermetallic Compounds in LiCl-KCl Eutectic Melts
摘要
Abstract
The electrochemical behavior of Dy(III) in LiCl-KCl melts and the al oying mechanism of Dy-Ni al oys were investigated by cyclic voltammetry, square wave voltammetry, and open circuit chronopotentiometry. Cyclic voltammetry and square wave voltammetry experiments indicated that the reduction of Dy(III) ions to Dy metal occurred in a single step with the exchange of three electrons. Compared with cyclic voltammograms on an inert W electrode, three reduction peaks are observed. This indicates the under-potential deposition of Dy(III) on a reactive Ni electrode because of the formation of Dy-Ni al oy compounds. Dy-Ni al oys were prepared by potentiostatic electrolysis at-1.6,-1.8, and-2.0 V and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive spectrometry (EDS). The results confirm that different Dy-Ni compounds:DyNi5, Dy2Ni7, and DyNi2 can be selectively obtained by potentiostatic electrolysis at different potentials.关键词
Dy-Ni金属间化合物/电化学行为/氯化物熔盐/恒电位电解/镍电极Key words
Dy-Ni intermetal ic compound/Electrochemical behavior/Molten chloride/Potentionstatic electrolysis/Ni electrode分类
化学化工引用本文复制引用
李梅,孙婷婷,刘斌,韩伟,孙扬,张密林..Dy（III）离子在LiCl-KCl熔盐中的电化学行为及Dy-Ni金属间化合物的选择性制备[J].物理化学学报,2015,(2):309-314,6.基金项目
The project was supported by the National Natural Science Foundation of China (21271054,21173060), Major Research Plan of the National Natural Science Foundation of China (91326113,91226201), and Fundamental Research Funds for the Central Universities, China (HEUCF201403001).国家自然科学基金(21271054,21173060)，国家自然科学基金重大研究计划(91326113,91226201)和中央高校基本科研业务经费(HEUCF201403001)资助 （21271054,21173060）
