电解液中La浓度对La-PbO_2/Ti电极性能的影响  

Effect of La concentration in electrolyte on properties of La–PbO_2/Ti electrode

作　　者：段小月[1] 李佳润[2] 陆丽[1] 常立民[2] 

机构地区：[1]吉林师范大学环境科学与工程学院,吉林四平136000 [2]吉林师范大学化学学院,吉林四平136000

出　　处：《电镀与涂饰》2016年第4期189-193,共5页Electroplating & Finishing

基　　金：吉林省科技发展计划项目(20150520079JH);四平市科技发展计划项目(2014055)

摘　　要：采用电沉积技术,通过改变由Pb(NO_3)_2 0.5 mol/L、NaF 0.05 mol/L和HNO_3 1.0 mol/L组成的电解液中La(NO_3)_3的浓度,制备了一系列La掺杂Ti基PbO_2电极(La-PbO_2/Ti)。利用扫描电子显微镜、X射线衍射、循环伏安法、荧光光谱法和加速寿命试验分别对其表面形貌、晶体结构、电化学性能、羟基自由基产生能力及使用寿命进行表征。结果表明:当电解液中La的浓度为4 mmol/L时,所得La-PbO_2/Ti电极晶粒尺寸最小,表面最平整致密,电催化氧化活性以及稳定性也明显优于其他电极。A series of La-doped PbO2-coated titanium （La-PbO2/Ti） electrode was prepared by electrodeposition with different La（NO3）3 concentrations in the electrolyte containing Pb（NO3）2 0.5 mol/L, NaF 0.05 mol/L and HNO3 1.0 mol/L. The surface morphologies, crystal structures, electrochemical properties, production capacity of hydroxyl radical and service life of the electrodes were characterized by scanning electron microscopy, X-ray diffraction, cyclic voltammetry, fluorescent spectrometry and accelerated life test, respectively. The results showed that the La-PbO2/Ti electrode obtained with 4 mmol/L La in electrolyte has smaller grain size, finer and more compact surface, and higher electrocatalytic activity and stability than other electrodes.

关 键 词：钛基氧化物涂层电极 二氧化铅 硝酸镧 掺杂 表征 电催化氧化 

分 类 号：TQ151[化学工程—电化学工业] TQ153