乙酰胺-尿素-NaBr熔体中电沉积Mg-Co合金的研究  

Preparation of Mg-Co alloy film in acetamide-urea-NaBr melt

作　　者：王建朝[1] 蒲丽[1] 李冰[1] 

机构地区：[1]青海师范大学化学系,西宁810008

出　　处：《华中师范大学学报（自然科学版）》2008年第4期569-573,共5页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金项目(50264004);教育部重点科学技术研究项目(03136).

摘　　要：在353 K的乙酰胺-尿素-NaBr熔体中,Co(Ⅱ)一步不可逆还原为金属Co,测得Co(Ⅱ)在Pt电极上α为0.308和D0为2.58×10-7cm2.s-1;Co(Ⅱ)在Cu电极上α为0.25,D0为3.2×10-6cm2.s-1.Mg(Ⅱ)不能单独被还原为Mg,但是可以被Co(II)诱导共沉积.由恒电位电解法得到非晶态的Mg-Co合金膜,合金中Mg的含量随着阴极电位的负移和Mg(Ⅱ)/Co(Ⅱ)摩尔比增大而增大,镁的最大含量可达28.75 wt%.Electroreduction of Co（Ⅱ） to Co in acetamide-urea-NaBr melt at 353 K is irreversible in one step. The a and the Do on Pt electrodes were determined as 0. 308 and 3. 2× 10^-6 cm^2·s^-1, The a and the Do on Cu electrodes were determined as 0.25 and 2.58×10^-7 cm^2·s^-1. Mg（Ⅱ） is not reduced to Mg alone,but can be inductively codepositly with Co （ Ⅱ ）. The content of magnesium increases with the cathode potential shifts to negative direction and the molar ratio Mg（ Ⅱ ）/ Co（ Ⅱ ） increases. The content of magnesium in deposit reaches 28. 75wt%. The Mg-Co film alloys electrodeposit is amorphous.

关 键 词：乙酰胺-尿素-NABR熔体 电还原 诱导共沉积 Mg-Co 非晶态合金膜 

分 类 号：O641.4[理学—物理化学]