稀土La掺杂对Ru-La-Ti涂层阳极电催化性能的影响  

Effect of Doping with Rare Earth Lanthanum on Electrocatalytic Activity of Titanium-Based Ru-La-Ti Coating Anode

作　　者：王清泉[1] 刘贵昌[1] 刘坤[1] 

机构地区：[1]大连理工大学材料化工系,辽宁大连116012

出　　处：《材料保护》2007年第5期1-3,16,共4页Materials Protection

摘　　要：利用热分解方法在不同温度下制备了不同摩尔分数La的三元涂层Ru0.3Ti(0.7-x)LaxO2,通过极化曲线测试和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表面形貌进行了观察。测试结果表明,在涂层中引入La可以提高涂层阳极的电催化活性。La的掺杂量有一个最佳比,摩尔分数为0.5时电催化性最好;适当的热分解温度有利于La涂层阳极性能的提高,最佳温度为450℃。Ru0.3Ti(0.7-x)LaxO2 ternary coating with different compositions were prepared at different temperatures via thermal decomposition.The electrocatalytic activity of the coating was investigated using anodic polarization curve test and alternate current impedance test.The morphology of the coating anode was observed using a scanning electron microscope(SEM).It was found that doping with rare earth La contributed to improving the electrocatalytic activity of the Ru-La-Ti coating anode,and the coating anode containing La molar ratio of 0.5 had the best electrocatalytic.At the same time,it was feasible to greatly improve the electrocatalytic activity of the coating anode by properly controlling the thermal decomposition temperature,and the suitable thermal decomposition temperature was suggested to be about 450 ℃.

关 键 词：稀土La 电催化活性 掺杂 涂层阳极 

分 类 号：TG174.41[金属学及工艺—金属表面处理]