锌电积用PbO_2复合惰性阳极材料制备及性能研究  

Preparation and electrochemical performance of PbO_2 composite inert anodes used in zinc electrowinning

作　　者：李世举[1] 陈步明[1] 徐瑞东[1] 黄利平[2] 郭忠诚[1,3] 龚锴 

机构地区：[1]昆明理工大学冶金与能源工程学院,云南昆明650093 [2]中国科学院无机涂层材料重点实验室,上海200050 [3]昆明理工恒达科技有限公司,云南昆明650106 [4]云南省石油化工锅炉压力容器检测中心站,云南昆明650233

出　　处：《电镀与涂饰》2012年第11期1-4,共4页Electroplating & Finishing

基　　金：国家自然科学基金(51004056);云南省应用基础研究计划2010ZC052);中国科学院无机涂层重点实验室开放基金(KKZ6201152009)

摘　　要：以3Cr13不锈钢为基体,在由PbO45g/L和NaOH160g/L组成的镀液中加入20g/LCeO2(平均粒径30nm)或/和20g/LB4C(平均粒径6μm),采用阳极电沉积的方法制备了α-PbO2–B4C、α-PbO2–CeO2、α-PbO2–CeO2–B4C等3种复合惰性阳极材料,观察了其表面微观组织特征,测试了其电沉积时的阳极极化曲线以及在ZnSO4–H2SO4溶液中的循环伏安曲线和塔菲尔曲线,并与纯α-PbO2电极进行了对比。结果表明,CeO2、B4C或其两者与α-PbO2的共沉积改变了阳极沉积电位和α-PbO2的电结晶形貌,使晶粒尺寸减小,并导致α-PbO2在ZnSO4–H2SO4溶液中的阴极还原峰电位正移,及有助于提高α-PbO2的耐蚀性。α-PbO2–CeO2和α-PbO2–CeO2–B4C复合惰性阳极材料分别在低电位区和高电位区具有良好的析氧电催化活性。α-PbO2-B4C, α-PbO2-CeO2, and α-PbO2--CeO2- B4C inert anodes were prepared on 3Cr13 stainless steel substrate by anodic electrodeposition from a PbO 45 g/L ＋ NaOH 160 g/L bath with 20 g/L CeO2 （average particle size 30 nm） and/or 20 g/L B4C （average particle size 6 gm）. The surface microstructures, anodic polarization curves during electrodeposition, as well as cyclic voltammograms and Tafel polarization curves in ZnSO4-H2SO4 solution of the three anodes were studied and compared with those of purec α-PbO2 anode. The results showed that the codeposition of either or both CeO2 and B4C particles with α-PbO2 changes the anodicdeposition potential and electrocrystallization morphology of α-PbO2, which is characterized by the decrease of grain size, leads to a positive shift of cathodic reduction peak potential of α-PbO2 in ZnSO4-H2SO4 solution, and improves the corrosion resistance of α-PbO2, α-PbO2-CeO2 and ct-PbO2- CeO2-B4C composite inert anodes show good electrocatalytic activity for oxygen evolution in low and high potential regions, respectively.

关 键 词：不锈钢 二氧化铅 氧化铈 碳化硼 FEl极 复合 电沉积 锌电积 析氧 

分 类 号：TG178[金属学及工艺—金属表面处理] TQ153.2[金属学及工艺—金属学]