(浙江工業(yè)大學(xué) 化學(xué)工程與材料學(xué)院，杭州 310032)
摘 要: 采用鈦片在氮?dú)庵?00 ℃退火的方法，在鈦片表面原位生成TiN薄膜，并以此為基體采用熱分解法制備IrO2-Ta2O5涂層鈦陽(yáng)極。研究含TiN中間層IrO2-Ta2O5涂層鈦陽(yáng)極及傳統(tǒng)IrO2-Ta2O5涂層鈦陽(yáng)極的開(kāi)路電位、析氧行為、循環(huán)伏安和電化學(xué)阻抗等性能。結(jié)果表明：含TiN中間層IrO2-Ta2O5涂層鈦陽(yáng)極具有非連續(xù)狀裂紋結(jié)構(gòu)，且表面生長(zhǎng)出大量IrO2納米晶體，其電催化析氧性能優(yōu)于傳統(tǒng)IrO2-Ta2O5涂層鈦陽(yáng)極的電催化析氧性能；涂層燒結(jié)溫度越低，電化學(xué)性能越好；當(dāng)燒結(jié)溫度低于500 ℃時(shí)，TiN中間層可以顯著延長(zhǎng)IrO2-Ta2O5涂層鈦陽(yáng)極的工作壽命。
關(guān)鍵字: TiN薄膜；IrO2-Ta2O5涂層；鈦陽(yáng)極；電催化性能；熱處理
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
