(浙江工业大学 化学工程与材料学院，杭州 310032)
摘 要: 采用钛片在氮气中700 ℃退火的方法，在钛片表面原位生成TiN薄膜，并以此为基体采用热分解法制备IrO2-Ta2O5涂层钛阳极。研究含TiN中间层IrO2-Ta2O5涂层钛阳极及传统IrO2-Ta2O5涂层钛阳极的开路电位、析氧行为、循环伏安和电化学阻抗等性能。结果表明：含TiN中间层IrO2-Ta2O5涂层钛阳极具有非连续状裂纹结构，且表面生长出大量IrO2纳米晶体，其电催化析氧性能优于传统IrO2-Ta2O5涂层钛阳极的电催化析氧性能；涂层烧结温度越低，电化学性能越好；当烧结温度低于500 ℃时，TiN中间层可以显著延长IrO2-Ta2O5涂层钛阳极的工作寿命。
关键字: TiN薄膜；IrO2-Ta2O5涂层；钛阳极；电催化性能；热处理
IrO2-Ta2O5/Ti coating anodes with TiN interlayer
（College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China）
Abstract:TiN film was prepared by heating treatment of titanium plates under N2 flow at 700 ℃, and IrO2-Ta2O5 coating was formed on the as-prepared Ti/TiN substrate by thermal decomposition method. The electrocatalytic properties of the IrO2-Ta2O5 /Ti coating anodes with and without TiN interlayer, such as the open-circuit potential, oxygen evolution, cyclic voltammetry and electrochemical impedance spectroscopy were investigated. The results show that the IrO2-Ta2O5/TiN/Ti anodes have discontinuity crack and abundant IrO2 nanocrystals on the surface, which results in better electrocatalytic properties than the normal IrO2-Ta2O5/Ti anodes. The lower the sintering temperature for coating of IrO2-Ta2O5 layer is, the better electrochemical properties the IrO2-Ta2O5/TiN/Ti anodes have. The TiN film can increase the life time of coating anodes prepared at temperature lower than 500 ℃.
Key words: TiN film; IrO2-Ta2O5; coating; Ti anodes; electrocatalytic properties; heat treatment
