Ce-Co合金膜在乙酰胺-尿素-NaBr熔体中电化学制备的研究  

Electrodeposition of Ce-Co alloy film in acetamide-urea-NaBr melted system

作　　者：郭承育[1] 王建朝[1] 王金贵[1] 陈必清[1] 

机构地区：[1]青海师范大学化学系,青海西宁810008

出　　处：《云南大学学报（自然科学版）》2006年第5期435-440,共6页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金资助项目(50264004)

摘　　要：应用循环曲线法研究了在353 K的乙酰胺-尿素-NaBr熔体中Co2+在Pt和Cu电极上的电化学行为,获知Co2+电还原为金属Co是一步不可逆过程,测得α为0.28,D0为4.65×10-5cm2/s;而Ce3+不能单独还原为Ce,但可以被Co(Ⅱ)诱导而共沉积;由恒电位电解法得到非晶态的Ce-Co合金,Ce-Co合金膜中Ce的质量分数随电位、时间和浓度的变化而变化,其合金膜中Ce的质量分数的最大值可达64.65%.The cyclic voharnmetry was used to study the behavior of Co^2 ＋ on Pt and Cu electrodes in melted acetamide-urea-NaBr at 353 K. Electroreduction of Co^2＋ to metallic Co is irreversible in one step. The a and Do were determined as 0.24 and 3.65×10^-5cm^2·s^-1. While Ce^3＋ cannot be reduced to Ce directly, but can be inductively eodeposited with Co^2＋ . The amorphous Ce-Co alloy films were obtained by potentiostatic electrolysis, and the amount of Ce in Ce-Co alloy increases with increasing of the cathodic overpotential, the molar ratios of Ce（ Ⅲ ） to Co（ Ⅱ ） and the electrolysis time. The maximum amount of Ce in alloy film reaches to 64.65% （wt） in the experiment.

关 键 词：乙酰胺-尿素-NABR熔体 电还原 诱导共沉积 Ce-Co合金膜 稀土 

分 类 号：TG146.4[一般工业技术—材料科学与工程]