LiCl-KCl熔盐中Gd(Ⅲ)在Bi电极上的电化学行为及Bi_xGd_y金属间化合物的热力学数据  

Electrochemical Behaviour of Gd(Ⅲ) on Bi Electrode and Thermodynamic Data of Bi_xGd_y Intermetallic Compounds in LiCl-KCl Molten Salts

作　　者：姜涛[1] 王宁[1] 彭述明[1] 李梅[2] 韩伟[2] 陈一东 JIANG Tao;WANG Ning;PENG Shuming;LI Mei;HAN Wei;CHEN Yitung(Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621999,China;Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education,College of Materials Science and Chemical Engineering,Harbin Engineering Universtiy,Harbin 150001,China;Department of Mechanical Engineering,Univeristy of Nevada Las Vegas,Las Vegas NV,89154-4027,United States)

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621999 [2]哈尔滨工程大学材料科学与化学工程学院教育部超轻材料与表面技术重点实验室,哈尔滨150001 [3]美国内华达大学拉斯维加斯分校机械工程系,拉斯维加斯891544027

出　　处：《高等学校化学学报》2018年第8期1759-1767,共9页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:U1630102;11675044;11575047);国家自然科学基金重大研究计划项目(批准号:91426302;91326113);中央高校基本科研业务经费(批准号:HEUCF2016012)资助~~

摘　　要：采用多种电化学技术研究了在723~823 K范围内Li Cl-KCl熔盐中Gd(Ⅲ)在液态Bi电极和Bi膜电极上的电化学行为.利用开路计时电位法估算了Bi-Gd金属间化合物(Bi2Gd,Bi Gd,Bi3Gd4,Bi3Gd5)的活度、相对偏摩尔吉布斯自由能、生成吉布斯自由能、生成焓和生成熵等热力学数据.通过恒电流和恒电位电解,在液态Bi电极上制备了Bi-Gd合金,并采用X射线衍射(XRD)和扫描电子显微镜-能量散射谱(SEM-EDS)表征了其结构.在恒电流电解中所得金属间化合物为Bi Gd,而在恒电位电解中所得金属间化合物为Bi3Gd5.Electrochemical behaviours of Gd（ Ⅲ） were investigated on liquid Bi pool electrode and Bi film electrode in eutectic Li Cl-KCl molten salts in the temperature range of 723—823 K by a series of electrochemical techniques. Moreover,the thermodynamic data,such as activities and relative partial molar Gibbs energies of Gd in the Bi-Gd alloys as well as the Gibbs energies,enthalpies and entropies of formation for Bi2 Gd,Bi Gd,Bi3 Gd4 and Bi3 Gd5 were calculated using open circuit chronopotentiometry. Galvanostatic and potentiostatic electrolysis were performed to prepare the Bi-Gd alloy on liquid Bi electrode. The alloy samples were characterized by X-ray diffraction（ XRD） and scanning electronic microscopy-energy dispersive spectrometry（ SEM-EDS）. The results indicate that Bi-Gd alloys are comprised of Bi Gd and Bi3 Gd5 phase,respectively.

关 键 词：电化学行为 铋电极 热力学性质 铋-镉合金 氯化物熔盐 

分 类 号：O641[理学—物理化学] O643[理学—化学]