含石墨烯IrO_2^-Ta_2O_5涂层钛阳极失效行为研究  

Study on Failure Behaviour of IrO_2-Ta_2O_5 Coated Titanium Anodes with Graphene

作　　者：宁慧利 辛永磊[2] 许立坤[2] 杜爱玲[1] 程德彬 

机构地区：[1]山东大学化学与化工学院,山东济南250100 [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级重点实验室,山东青岛266101 [3]海军驻洛阳407厂军代室,河南洛阳471039

出　　处：《热加工工艺》2015年第18期147-151,共5页Hot Working Technology

摘　　要：采用热分解法制备了加有一定量石墨烯(graphene)的Ir O2-Ta2O5涂层钛阳极(Ti/IrO2-Ta2O5-G),并运用场发射扫描电镜、能谱仪等分析手段和循环伏安、电化学阻抗谱、强化电解寿命等测试方法对阳极失效前后的微观形貌和电化学性能进行研究。结果表明:与传统的Ti/IrO2-Ta2O5阳极相比,Ti/IrO2-Ta2O5-G阳极在强化电解过程中槽压呈逐渐上升趋势,具有更长的强化电解寿命;涂层破损导致催化活性组分减少是Ti/IrO2-Ta2O5-G阳极失效的主要原因;失效后的Ti/IrO2-Ta2O5-G阳极仍具有一定的电催化活性。The IrO2-Ta2O5 coated titanium anodes （Ti/IrO2-Ta2O5-G） with certain graphene contents were prepared by thermal decomposition method. The microstructure was analyzed by FESEM and EDS, and the electrochemical properties were investigated by electrochemical testing including accelerated life test （ALT）, cyclic voltammetry （CV）, and electrochemical impedance spectroscopy （EIS）. As compared with the traditional Ti/IrO2-Ta2O5 anode, the results indicate that the cell voltage of Ti/IrO2-Ta2O5-G anodes increases gradually with electrolysis time and has longer accelerated life. The components of electrocatalytic activity reduce with coating damaged, and it is the primary factor of Ti/IrO2-Ta2O5-G anodes leading to failure. The invalidated Ti/IrO2-Ta2O5-G anodes still have certain electrocatalytic activity.

关 键 词：IR O2-Ta2O5 石墨烯 钛阳极 强化电解 

分 类 号：TG146.4[一般工业技术—材料科学与工程] TB321[金属学及工艺—金属材料]