Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第19卷    第8期    总第125期    2009年8月

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文章编号:1004-0609(2009)08-1473-07
含TiN中间层IrO2-Ta2O5涂层钛阳极的电催化性能
叶张军,甘永平,张文魁,黄  辉,陶新永

(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。

 

关键词: TiN薄膜;IrO2-Ta2O5涂层;钛阳极;电催化性能;热处理

Electrocatalytic properties of
IrO2-Ta2O5/Ti coating anodes with TiN interlayer
YE Zhang-jun, GAN Yong-ping, ZHANG Wen-kui, HUANG Hui, TAO Xin-yong

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

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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