不同前驱体制备的锡锑中间层对Ti／SnO2＋Sb2O3／PbO2电极性能的影响

Characterization of Ti/SnO2+Sb2O3/PbO2 Anodes with Intermediate Layers Obtained by Different Precursors

摘要:

研究了以乙二醇与柠檬酸反应制得的乙二醇柠檬酸酯溶液、乙二醇、乙醇、正丁醇为前驱体溶剂制备的锡锑中间层对Ti/SnO2 Sb2O3/PbO2电极性能的影响，用XRD、ESEM对不同前驱体制备的锡锑中间层和对应的二氧化铅活性层进行了表征，并用极化曲线法和阳极寿命快速检测法比较了不同前驱体对Ti/SnO2 Sb2O3/PbO2电极的阳极寿命和在1．0mol/L硫酸溶液中的电催化活性的影响。结果表明，不同前驱体溶剂对锡锑中间层的结构和形貌有着显著的影响；以乙二醇与柠檬酸反应制得的聚合前驱体为溶剂制备的锡锑中间层表面致密，锡锑含量相对较高，该中间层的均匀度和平整度明显好于其它3种前驱体。由聚合前驱体中间层制得的Ti/SnO2 Sb2O3/PbO2电极的使用寿命明显提高，但不同中间层前驱体对电极的电催化活性影响不大。

Abstract:

The characterizations of Ti/SnO2+Sb2O3/PbO2 anodes with SnO2+Sb2O3 as an intermediate layer obtained by way of a polymeric precursor, and using ethylene glycol, ethanol and n-butanol for different precursor solvents were studied. The microstructure, morphology of the SnO2+Sb2O3 layers derived from different precursor solvents and the top PbO2 active layers were examined using by XRD and ESEM. The lifetime and the electro-catalytic activity of Ti/SnO2+Sb2O3/PbO2 anodes with the intermediate layers prepared from different precursors were also assessed by the polarization method and the accelerated lifetime test in 1.0 mol/L H2SO4 solutions. The results showed that the microstructure and, morphology of the SnO2+Sb2O3 layers were correlated to precursor solvents. The intermediate layer made from a polymeric precursor was more compact, homogeneous, possess better surface smoothness, and a higher content of SnO2 and Sb2O3 as compared with that from the other solvents. Thus the Ti/SnO2+ Sb2O3/PbO2 anode prepared from the polymeric precursor had a longer lifetime than that with other solvents, but the intermediate layers prepared from different precursor solvents had little effect on the electro-catalytic activity of Ti/SnO2+Sb2O3/PbO2 anodes.