乙酰胺-尿素-NaBr熔体中电沉积Gd-Mg-Ni合金的研究  

Study on Electrodeposition of Gd-Mg-Ni Alloy Film in Acetamide-urea-NaBr Melt

作　　者：陈必清[1] 王建朝[1] 郭承育[1] 

机构地区：[1]青海师范大学化学系,青海西宁810008

出　　处：《稀土》2011年第6期1-5,共5页Chinese Rare Earths

基　　金：国家自然科学基金资助项目（50264004）; 教育部重点科学技术研究资助项目（03136）

摘　　要：RE-Mg-Ni系三元合金是AB3型新型储氢材料。研究了在乙酰胺-尿素-NaBr熔体中（353K）电沉积制备该合金的可行性。循环伏安法研究证实,该熔体中,Gd（Ⅲ）、Mg（Ⅱ）在Pt、Cu电极上不能单独沉积,但可以被铁族Ni（Ⅱ）诱导共沉积。在Cu基体上由恒电位电解法成功的沉积出Gd-Mg-Ni合金膜,合金膜中Gd和Mg的含量随电解电位、时间及Gd（Ⅲ）/Mg（Ⅱ）/Ni（Ⅱ）摩尔比的变化而变化。实验同时研究了Ni（Ⅱ）在Pt、Cu电极上的电化学行为,表明其还原为一步完全不可逆反应,并测得其传递系数α和扩散系数D0。RE-Mg-Ni ternary alloy is a new AB3 type hydrogen storage material.The electrodeposition preparation of the alloys in acetamide-urea-NaBr melt at 353K was studied.The cyclic voltammetry experiment proved that Gd（Ⅲ） and Mg（Ⅱ） cannot be reduced to Gd and Mg directly on Pt or Cu electrodes but can be inductively codeposited with Ni（Ⅱ）.The amorphous Gd-Mg-Ni alloy films was obtained on Cu electrodes by potentiostatic electrolysis.The content of Gd and Mg in the Gd-Mg-Ni alloy film changes with the cathode potential,molar ratio of Gd（Ⅲ）/ Mg（Ⅱ）/ Ni（Ⅱ） and the electrolysis time.The electrochemistry behavior of Ni（Ⅱ） on Pt or Cu electrodes was studied.The results showed that the reduction is irreversible in one step.Diffusion coefficient α and electron transfer coefficient D0 were measured.

关 键 词：稀土 乙酰胺-尿素-NABR熔体 循环伏安曲线 诱导共沉积 Gd-Mg-Ni合金 

分 类 号：TF803.27[冶金工程—有色金属冶金]