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Acta Chimica Sinica ›› 2006, Vol. 64 ›› Issue (7): 647-651. Previous Articles     Next Articles

Original Articles

贵金属掺杂Ti/TiO2电极的制备及其电催化性能研究

孙娟*,1，沈嘉年1，姚书典1,2   

  1. (1上海大学材料研究所 上海 200072)
    (2北京冶金设备研究设计总院 北京 100029)
  • 投稿日期:2005-09-08 修回日期:2005-12-15 发布日期:2006-04-15
  • 通讯作者: 孙娟

Study on Preparation and Electrocatalytic Activities of the Modified Ti/TiO2 Electrodes by Doping Noble Metal

SUN Juan*,1, SHEN Jia-Nian1, YAO Shu-Dian1,2   

  1. (1 Institute of Materials, Shanghai University, Shanghai 200072)
    (2 Beijing Institute for Metallurgical Equipment Research, Beijing 100029)A two-step procedure was used for the preparation of the modified Ti/TiO2-Pt/Ir anodes: anodisation of the titanium substrate to form a microporous oxide film with subsequent doping Pt or Ir by cathodic deposition of an oxygen evolution reaction (OER) electrocatalyser. The characterization of the modified films was carried out by X-ray and SEM. In the case of Ti/TiO2-Pt, Pt is deposited preferentially within some of the micropores of the TiO2 film. Ir however, is distributed preferentially across the surface of the oxide film. The difference is thought to result from the position of the metal deposition potential with respect to the flat band potential of n-TiO2. Composition profile of different elements in thin film T
  • Received:2005-09-08 Revised:2005-12-15 Published:2006-04-15
  • Contact: SUN Juan

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A two-step procedure was used for the preparation of the modified Ti/TiO2-Pt/Ir anodes: anodisation of the titanium substrate to form a microporous oxide film with subsequent doping Pt or Ir by cathodic deposition of an oxygen evolution reaction (OER) electrocatalyser. The characterization of the modified films was carried out by X-ray and SEM. In the case of Ti/TiO2-Pt, Pt is deposited preferentially within some of the micropores of the TiO2 film. Ir however, is distributed preferentially across the surface of the oxide film. The difference is thought to result from the position of the metal deposition potential with respect to the flat band potential of n-TiO2. Composition profile of different elements in thin film Ti/TiO2-(Pt/Ir) anodes was carried out by SIMS, and the TiO2 film thickness is obtained, ca. 750 nm. According to the results obtained by means of stationary current-potential curves and impedance spectra, Pt/Ir doping has improved the electrocatalytic activities.

Key words: titanium anode, electrocatalytic, doping, microporous film, secondary ion mass spectrometry