标题：Electrolytic Production of Nickel-Cobalt Magnetic Alloys from Solid Oxides in Molten Carbonates
作者： Zheng, KY (Zheng, Kaiyuan); Cheng, XH (Cheng, Xinhua); Dou, YP (Dou, Yanpeng); Zhu, H (Zhu, Hua); Wang, DH (Wang, Dihua)
来源出版物：JOURNAL OF THE ELECTROCHEMICAL SOCIETY卷：164期：13页码: E422-E427 DOI：10.1149/2.1141713jes 出版年： 2017
摘要： Nickel-cobalt (Ni-Co) alloy was prepared by electrochemical reduction of solid NiO and Co3O4 powder in molten Na2CO3-K2CO3 melt at 750 degrees C. Cyclic voltammetry (CV) and potentiostatic electrolysis experiments indicate that the electroreduction experiences an initial rapid reduction of Co3O4 to CoO, followed by a further co-reduction of NiO and CoO to Ni-Co alloy. The metallic Ni-Co powder was obtained either by potentiostatic electrolysis at potential more negative than -1.25 V (vs. Ag/Ag2SO4) or by constant cell voltage electrolysis at above 1.7 V. An oxide-layer-covered Ni11Fe10Cu alloy rod serving as an inert anode for oxygen evolution behaved stably and reliably for long-term operation. Ni and Co distributed uniformly in the product. The morphology and crystal phase of the alloy was significantly influenced by the electrolysis time. Furthermore, the obtained Ni-Co powders were typical ferromagnetic alloy with relatively high saturation magnetization.
扩展关键词： CO-NI ALLOYS; ELECTROCHEMICAL REDUCTION; SOLVOTHERMAL SYNTHESIS; INERT ANODE; ELECTRODEPOSITION; NANOSTRUCTURES; MORPHOLOGY; CHLORIDE; POWDER; OXYGEN
通讯作者地址：Wang, DH (reprint author), Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.
[Zheng, Kaiyuan; Cheng, Xinhua; Dou, Yanpeng; Zhu, Hua; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Hubei, Peoples R China.
版权所有 © 武汉大学资源与环境科学学院