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›› 2003, Vol. 3 ›› Issue (4): 0-0.

• 4 •    

Electrocatalytic Activity of Ti/TiO2 Electrodes in H2SO4 Solution

WANG Ya-qiong(王雅琼),TONG Hong-yang(童宏扬),XU Wen-lin(许文林)   

  1. College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
  • 出版日期:2003-08-20 发布日期:2003-08-20

Electrocatalytic Activity of Ti/TiO2 Electrodes in H2SO4 Solution

WANG Ya-qiong(王雅琼),TONG Hong-yang(童宏扬),XU Wen-lin(许文林)   

  1. 1. Inst. Chem. Metall., Chinese Academy of Sciences, Beijing 100080, China; 2. Dept. Phy-chem., Univ. Sci. & Technol. Beijing, Beijing 100083, China
  • Online:2003-08-20 Published:2003-08-20

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摘要： Ti/TiO2 electrodes were prepared with the polymeric precursor method (PPM). The structure and morphology of Ti/TiO2 electrodes were examined with XRD and ESEM. The voltammetric charge (q*) of Ti/TiO2 electrodes as cathode in 0.5 mol/L H2SO4 solution was investigated with cyclic voltammetry. It was found that the electrocatalytic activity of the Ti/TiO2 electrodes was affected by the structure and morphology of the Ti/TiO2 electrodes, in other words, was affected by the calcination conditions of preparing the electrodes. The value of q*in was considerably larger than that of q*out, which means that the ‘inner’ active surface area was much larger than the ‘outer’ active surface area, and ‘inner’ active surface played a main role in the electrocatalytic activity of the Ti/TiO2 electrodes.

关键词: voltammetric charge, active surface, TiO2 electrode, electrochemistry

Abstract: Combustion synthesis of Al2O3-TiC-ZrO2 composites by reaction in the Al-TiO2-C-ZrO2 system is a new method with advantages of simplicity and efficiency. In the present work, the adiabatic combustion temperature of this complex system is calculated and the possible combustion products are discussed by a new approach of overlapped phase stability diagrams (PSD) of Al-O-N, Ti-O-N, Zr-O-N and C-O-N systems. Thermodynamic analysis shows that the adiabatic combustion temperature of the Al-TiO2-C-ZrO2 system with the addition of 10% ZrO2 is 2327 K which is the melting point of Al2O3, and the combustion product is a mixture of Al2O3-TiC-ZrO2. Microstructure and chemical composition of the combustion products are studied by X-ray diffraction analysis (XRD) and transmission electron microscope (TEM) respectively.

Key words: voltammetric charge, active surface, TiO2 electrode, electrochemistry

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