稀土在电沉积镍-钴合金中的作用  

Function of rare earth compounds electrodeposition of nickel-cobalt alloy

作　　者：汪继红[1] 费锡明[1] 李伟[1] 肖作安[1] 

机构地区：[1]华中师范大学化学学院,湖北武汉430079

出　　处：《化学研究与应用》2003年第4期535-537,共3页Chemical Research and Application

摘　　要：Mechanism of electrodeposition nickelcobalt alloy and electrocatalytic properties of hydrogen evolution of nickelcobalt obtained in a sulfate bath with or without rare earth compounds were studied.The experimental results showed that the process of nickelcobalt alloy belonged to"anomalous codeposition".By measuring the cathodic polarization curves,the surface structure and the components of nickelcobalt alloy,when a small amount of rare earth compounds was added to the bath,the cathodic polarization of electrodepositing process was decreased,the alloy coatings gained from the bath containing Ce(SO4)2 became higher in the electrocatalytic properties of hydrogen evolution in 7mol·L-1 KOH and roaser in grain size and less in cobalt content.Mechanism of electrodeposition nickelcobalt alloy and electrocatalytic properties of hydrogen evolution of nickelcobalt obtained in a sulfate bath with or without rare earth compounds were studied.The experimental results showed that the process of nickelcobalt alloy belonged to'anomalous codeposition'.By measuring the cathodic polarization curves,the surface structure and the components of nickelcobalt alloy,when a small amount of rare earth compounds was added to the bath,the cathodic polarization of electrodepositing process was decreased,the alloy coatings gained from the bath containing Ce(SO4)2 became higher in the electrocatalytic properties of hydrogen evolution in 7mol·L-1 KOH and roaser in grain size and less in cobalt content.

关 键 词：稀土元素 电沉积 镍-钴合金 作用 镀层 电极 电催化活性 

分 类 号：TQ153.2[化学工程—电化学工业]