AVS 56th International Symposium & Exhibition
    Surface Science Tuesday Sessions
       Session SS-TuP

Paper SS-TuP8
In Situ High Pressure X-ray Photoelectron Spectroscopy Studies of the Adsorption of CO and O2 on Au Nanoparticles Grown on TiO2(110) Surfaces

Tuesday, November 10, 2009, 6:00 pm, Room Hall 3

Session: Surface Science Poster Session I and Mort Traum Finalists
Presenter: P. Jiang, Lawrence Berkeley National Laboratory
Authors: P. Jiang, Lawrence Berkeley National Laboratory
S. Porsgaard, Lawrence Berkeley National Laboratory
F. Borondics, Lawrence Berkeley National Laboratory
M. Kober, Lawrence Berkeley National Laboratory
Z. Liu, Lawrence Berkeley National Laboratory
M. Salmeron, Lawrence Berkeley National Laboratory
H. Bluhm, Lawrence Berkeley National Laboratory
Correspondent: Click to Email
Gold nanoparticles supported on TiO2 surfaces are effective catalysts for CO oxidation. Despite numerous studies on this system, the fundamental mechanism is still controversial, partly due to the challenging pressure gap. Using our special in situ high pressure X-ray photoelectron spectroscopy (HP-XPS), we systematically investigated the adsorption of CO and O2 on Au nanoparticles grown on TiO2(110) surfaces with different stoichiometries under real reaction conditions. We found that the synergism between Au and TiO2 surfaces plays the key role for the whole reaction process.