| Ce-Co合金膜在乙酰胺-尿素-NaBr熔体中电化学制备的研究 |
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| 引用本文： | 郭承育,王建朝,王金贵,陈必清.Ce-Co合金膜在乙酰胺-尿素-NaBr熔体中电化学制备的研究[J].云南大学学报(自然科学版),2006,28(5):435-440. |
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| 作者姓名： | 郭承育 王建朝 王金贵 陈必清 |
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| 作者单位： | 青海师范大学,化学系,青海,西宁,810008 |
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| 基金项目： | 国家自然科学基金资助项目(50264004) |
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| 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%.
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| 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 |
| 文章编号： | 0258-7971(2006)05-0435-06 |
| 修稿时间： | 2005年6月3日 |
Electrodeposition of Ce-Co alloy film in acetamide-urea-NaBr melted system |
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| GUO Cheng-yu,WANG Jian-chao,WANG Jin-gui,CHEN Bi-qing.Electrodeposition of Ce-Co alloy film in acetamide-urea-NaBr melted system[J].Journal of Yunnan University(Natural Sciences),2006,28(5):435-440. |
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| Authors: | GUO Cheng-yu WANG Jian-chao WANG Jin-gui CHEN Bi-qing |
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| Institution: | Department of Chemistry, Qinghai Normal University, Xining 810008, China |
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| Abstract: | The cyclic voltammetry was used to study the behavior of Co2+ on Pt and Cu electrodes in melted acetamide-urea-NaBr at 353K.Electroreduction of Co2+ to metallic Co is irreversible in one step.The α and D0 were determined as 0.24 and 3.65×10-5cm2·s-1.While Ce3+ cannot be reduced to Ce directly,but can be inductively codeposited with Co2+.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. |
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| Keywords: | acetamide-urea-NaBr electroreduction inductive codeposition Ce-Co alloy film rare earths |
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