Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (11): 1990-1906.DOI: 10.1016/S1872-2067(14)60172-8

• Articles • Previous Articles    

Effect of Pt cocatalyst in Pt/TiO2 studied by in situ FTIR of CO adsorption

Shuai Shena,b, Xiuli Wanga, Qian Dinga,b, Shaoqing Jina,b, Zhaochi Fenga, Can Lia   

  1. a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, Liaoning, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-05-10 Revised:2014-06-19 Online:2014-11-06 Published:2014-11-06
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21090341, 21173213, 21373209) and the National Basic Research Program of China (973 Program, 2009CB220010, 2009CB623507).

Abstract:

In situ transmission infrared spectroscopy was used to study the role of Pt cocatalyst in Pt/TiO2 using CO as a probe molecule. An 11 cm-1 redshift of CO adsorbed on Pt/TiO2 was observed under irradiation in the absence of changes in the CO coverage or sample temperature. In contrast, no CO shift was detected on Pt/Al2O3. This indicates that the redshift of the CO adsorption peak is due to the photogenerated electron transfer from TiO2 to Pt, and this accounts for the increased photocatalytic activity by the loaded Pt cocatalyst.

Key words: Carbon monoxide adsorption, Platinum, Titania, Cocatalyst, Photocatalysis, In situ FTIR