Nanoclusters of TiO2 wetted with gold

作者：Park K T^*; Meunier V; Pan M H; Shelton W A; Yu N H; Plummer E W

来源：Surface Science, 2009, 603(20): 3131-3135.

DOI：10.1016/j.susc.2009.08.028

• Density functional calculations
• Scanning tunneling microscopy
• Surface structure, morphology, roughness and topography
• Chemisorption
• Titanium oxide
• Gold
• Carbon monoxide

We combined scanning tunneling microscopy and density functional theory to establish the structure-functionality relationship for nanometer-sized defects on TiO2(1 1 0). Three-angstrom high topographically distinct dots are ascribed to stoichiometric TiO2 nanoclusters with low coordination numbers. The under-coordinated O atoms of the nanocluster, with surface O atoms, provide exceptionally strong binding sites for Au nanoparticles. Our atomistic model elucidates a number of characteristics salient to low temperature CO oxidation by Au nanoparticles.

• 出版日期2009-10-15