Acta Phys. -Chim. Sin. ›› 2003, Vol. 19 ›› Issue (02): 100-104.doi: 10.3866/PKU.WHXB20030202

• ARTICLE • Previous Articles     Next Articles

The Photocatalytic Enhancement Effect of CO on Pd/TiO2

Zhang Min;Jin Zhen-Sheng;Wang Shou-Bin;Zhang Shun-Li;Zhang Zhi-Jun   

  1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000;Laboratory of Special Functional Materials, Henan University, Kaifeng 475001
  • Received:2002-04-02 Revised:2002-06-24 Published:2003-02-15
  • Contact: Jin Zhen-Sheng;

Abstract: The photocatalytic oxidation of CO on Pd(2%)/TiO2 was investigated. It was found that CO oxidation activity on Pd/TiO2 was greatly enhanced if illuminated with UV light(λ=365 nm) as compared with that in the dark(the ratio of the above two rate constants is ca. 15). But on bare TiO2 no CO oxidation reaction was observed both in the dark and under UV light illumination. The photocatalytic enhancement of CO on Pd/TiO2 could be elucidated by the increase of surface concentration of oxygen atoms (or O-) on Pd and the spillover of oxygen atoms from Pd to TiO2.

Key words: CO oxidation, Pd(2%)/TiO2, Oxygen atom, Photocatalytic enhancement, Spillover