Ti/IrO_2-Ta_2O_5-SnO_2纳米氧化物阳极的研究  

Study on the Nanostructured Ti/IrO_2-Ta_2O_5-SnO_2 Oxide Anodes

作　　者：唐益[1] 许立坤[1] 王均涛[1] 辛永磊[1] 龙萍 

机构地区：[1]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防科技重点实验室,山东青岛266071

出　　处：《稀有金属材料与工程》2010年第4期687-691,共5页Rare Metal Materials and Engineering

摘　　要：采用Pechini方法制备不同Sn含量的Ti/IrO2-Ta2O5-SnO2纳米氧化物阳极,并运用SEM、EDX、XRD等分析手段和析氧电位、循环伏安、强化电解等方法对阳极的表面形貌、微观结构和电化学性能进行研究。结果表明,制备的氧化物涂层由(IrSn)O2固溶体和非晶态的Ta2O5构成,组成与名义成分基本一致。随着Sn含量的增加,氧化物涂层表面裂纹增多。Sn的加入使Ti/IrO2-Ta2O5-SnO2氧化物阳极的析氧电位升高,稳定性降低。Nanostructured Ti/IrO2-Ta2O5-SnO2 oxide anodes with different Sn content were prepared by Pechini method. The surface morphology and microstructure were analyzed by SEM, EDX and XRD. The electrochemical activity and stability were investigated by electrochemical testing including oxygen evolving potential measurement, cyclic voltammetry, and accelerated life test. The results indicate that the oxide coatings are composed of （IrSn）O2 solid solution and amorphous Ta2O5, with the composition close to the nominal one. With the increase of Sn content, more microcracks appear on the anode surface. The addition of Sn into the IrO2-Ta2O5-SnO2 oxide coating increases the oxygen evolving potential and lowers the electrochemical stability

关 键 词：IrO2-Ta2O5-SnO2 Pechini法 纳米氧化物 阳极 

分 类 号：TG146.23[一般工业技术—材料科学与工程]