Analytical High Resolution TEM Study of Au/TiO 2 Catalysts

HRTEM(High-Resolution Transmission Electron Microscope), HAADF-STEM (High Angle Annular Dark Field Scanning Transmission Electron Microscope) and EELS(Electron Energy Loss Spectroscopy) techniques were applied for the characterization of Au/TiO 2 catalysts. HAADF-STEM provides precise size distributions for Au particles smaller than ~2nm in diameter. It was observed that many small particles under 2nm were supported on anatase TiO 2 having a large surface area. The HAADF-STEM method was examined as a way to measure the shape of Au particles. EELS measurements were also used to examine the interface between Au and TiO 2 support to study electronic structure effects.