摘要
在850℃的CaCl2熔盐中,以烧结后的Co3O4片体为阴极,高密度石墨碳棒为阳极,采用恒电压电解,成功制备出金属Co。采用扫描电子显微镜(SEM)分析样品电解前后的微观形貌;采用X射线衍射仪(XRD)分析电解产物的相组成。结果表明,烧结温度越高,试样的孔隙率越低,颗粒越大,电解速率越慢,产物的颗粒越大。经850℃烧结的氧化物试样,在3.1V工作电压下电解12h,可制备出海绵状纯相的金属Co。
Direct electro-deoxidization of powders of cobalt oxide （Co3O4） to the Co in molten CaCl2 at 850℃ by constant voltage （3.1V） electrolysis was demonstrated. The effects of the sintering temperatures on the micrograph of the oxide cathode and the electro-deoxidization process were studied. The products are examined by XRD and SEM respectively. The results show that the higher the sintering temperature, the lower the porosity, the larger the particles, which results in the larger grain of product and the lower electrolysis rate. The oxide cathode can be deoxidized to pure Co at the voltage of 3.1V after sintering at 850℃ for 4h.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2009年第5期830-832,835,共4页
Journal of Functional Materials
基金
河北省自然科学基金资助项目(E2007000594)
唐山市科学技术研究与发展计划资助项目(07150204-2)
关键词
电解
CO
氧化物
熔盐
electro-deoxidization
Co
oxide
molten salt
