钛基Ru-La-Sn涂层阳极的电催化性能

Electrocatalytic Activity of Titanium Based Ru-La-Sn Coating Anodes

摘要:

利用热分解法制备了不同La含量的钛基Ru-La-Sn涂层阳极，通过开路电位测试、循环伏安测试、阳极极化曲线测试和电化学交流阻抗谱测试研究了所制备涂层的电催化活性，并用扫描电镜对涂层阳极的表面形貌进行了观察。测试结果表明，制备温度对涂层阳极的表面形貌有很大影响，在涂层阳极中引入La可以提高涂层阳极的电催化活性，且La引入的最佳值为0．2(摩尔分数)。Ru-La-Sn涂层阳极电催化性能提高的原因在于La的引入可以增加涂层的有效活性表面积。

Abstract:

Titanium based Ru-La-Sn coating anodes with various La compositions are prepared by thermal decomposition. The electrocatalytic activity of coating anode is investigated by open-circuit potential test, cyclic voltammetry test, anodic polarization curve test and alternation current impedance test. The morphology of the coating anode is studied by scanning electron microscope (SEM). It is shown that the prepared temperature has a great influence on the morphology of coating anode. The electrocatalytic ability of coating anode can be improved by doping with rare earth La. The highest activity of the coating anode is associated with the composition corresponding to 0.2 (at mole fraction) La. The increase of activity is attributed to the enhancement of active surface area.