钛基钌镧氧化物涂层在NaCl溶液中的伏安行为  

Voltammetry Behavior of Ru-La Oxide Coatings on Ti Substrate in NaCl Solution

作　　者：龙萍 许立坤[2] 薛丽莉[1] 唐益[2] 辛永磊[2] 

机构地区：[1]哈尔滨工程大学,黑龙江哈尔滨150001 [2]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护国家重点实验室,山东青岛266101

出　　处：《稀有金属材料与工程》2014年第5期1133-1137,共5页Rare Metal Materials and Engineering

基　　金：中央高校基本科研业务费专项资金(HEUCF201310001)

摘　　要：采用热分解法制备Ti/Ru(1-x)LaxO2(0≤x≤0.7)氧化物涂层,通过极化曲线和循环伏安法对该系列涂层在3.5%NaCl溶液中的电化学行为进行了研究。结果表明,加镧的钌氧化物涂层具有更高的交换电流密度,更小的极化电阻和更大的伏安电荷,且当La浓度达到30 mol%时,表面电化学活性达到最大值。钌镧氧化物涂层的内活性表面积远大于外活性表面积,但随着含La量的增加,内活性表面积下降较大。The Ti/Ru（1-x）LaxO2（0≤x≤0.7） oxide coatings were prepared by thermal decomposition of the metal chlorides in the precursorsolution. The electrochemical behavior of the coatings was studied by Tafel curves and cyclic voltammetry （CV） in the 3.5% NaC1 solutionThe results show that Ru-La oxide coatings exhibit large exchange current density, voltammetric charge and lower polarization resistance,and the surface activity reaches a maximum value at the nominal La content of 30 mol%. Moreover, the ＇inner＇ electrochemical active areaof the Ru-La oxide coatings is much more than the ＇outer＇ electrochemical active area, and the former significantly decreases with theincrease of La content

关 键 词：镧 RUO2 活性表面积 伏安电荷 表面粗糙度 

分 类 号：TG174.451[金属学及工艺—金属表面处理]