Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (09): 1109-1116.DOI: 10.6023/A1109195 Previous Articles     Next Articles

Full Papers

电化学阻抗谱法研究铈改性TiO2 纳米管阵列光电极裂解水产氢动力学

张胜寒, 梁可心, 檀玉   

  1. 华北电力大学环境科学与工程学院 保定 071003
  • 投稿日期:2011-09-19 修回日期:2011-12-26 发布日期:2012-02-06
  • 通讯作者: 梁可心
  • 基金资助:

    中央高校基本科研业务费(No. 11QX79)资助项目.

Dynamics Study on the Cerium and Oxidative Cerium Modified TiO2 Nanotube Arrays for Hydrogen Production by Water Splitting Using Electrochemical Impedance Spectrum

Zhang Shenghan, Liang Kexin, Tan Yu   

  1. School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003
  • Received:2011-09-19 Revised:2011-12-26 Published:2012-02-06
  • Supported by:

    The project was supported by the Fundamental Research Funds for the Central Universities (No. 11QX79)

TiO2 nanotube arrays photoelectrodes were prepared by anode oxidation on pure Ti sheet. The donor material glycol (C2H6O2) added in the anode electrolyte significantly reduced the charge transfer impedance of TiO2 nanotubes to promote the photocatalytic water splitting for hydrogen production. TiO2 nanotube arrays electrodes were modified by cerium and oxidative cerium with electrochemical deposition and anodic oxidation. The flat band potential moves to the negative potential direction after modification. Electrochemical impedance spectrum (EIS) measurement was used to investigate the electron transfer characteristic in photoelectrodes and the interface characteristic in the photoelectrochemical cell (PEC) for hydrogen production. Arcs of EIS and corresponding electrode processes were discussed. Dynamic parameters of the electrodes were calculated by reasonable electrical equivalent circuit fitting. The results indicate that TiO2 nanotube arrays electrode modified by cerium and oxidative cerium could largely decrease the electron transfer resistance which contributes to hydrogen production. The mechanism of the cerium and oxidative cerium acting on TiO2 nanotube arrays to promote charge transfer is discussed.

Key words: TiO2 nanotube, cerium, oxidative cerium, EIS, water splitting, hydrogen