Adsorption of acetonitrile and its reaction with oxygen on TiO2-supported Au — Rh bimetallic catalysts

Enhanced Oxygen Activation over Supported Bimetallic Au-Ni Catalysts

CHARACTERIZATION OF Au-Rh AND Au-Mo BIMETALLIC NANOCLUSTERS ON TiO2(110): A COMPARATIVE STUDY

Gold-rhodium and gold-molybdenum layers were prepared on a nearly stoichiometric titania and characterized by LEIS, XPS and STM. In the Au-Rh bimetallic system, Rh atoms impinged onto Au clusters pregrown on TiO2(110) became covered by gold atoms. In contrast, Mo caused the disruption of gold nanoparticles.

Oxygen Activation and Reaction on Pd−Au Bimetallic Surfaces

Pd−Au bimetallic catalysts have shown promising performance for a number of oxidative reactions. The present study utilizes reactive molecular beam scattering (RMBS), reflection−absorption infrared spectroscopy (RAIRS), temperatureprogrammed desorption (TPD), and density functional theory (DFT) techniques in an attempt to enhance the fundamental understanding of oxygen activation and reaction w...

Characterization of Au-Rh/TiO2 bimetallic nanocatalysts by CO and CH3CN adsorption: XPS, TEM and FTIR measurements.

On X-ray photoelectron spectra of the Au-Rh/TiO2 catalysts the position of Au4f peak was practically unaffected by the presence of rhodium, the peak position of Rh3d, however, shifted to lower binding energy with the increase of gold content of the catalysts. Rh enrichment in the outer layers of the bimetallic crystallites was experienced. The bands due to Au0-CO, Rh0-CO and (Rh0)2-CO were obse...

Influence of TiO2 bulk defects on the CO adsorption and CO oxidation on Au/TiO2 – Electronic metal-support interactions (EMSI) in supported Au catalysts

Electronic metal-support interactions (EMSI) are demonstrated to severely affect the CO oxidation activity and the CO adsorption properties of Au/TiO2 catalysts. Bulk oxygen vacancies, generated by a strongly reductive pre-treatment of Au/TiO2 at elevated temperature in 10% CO/N2, significantly lower the catalytic activity for CO oxidation at 80°C. With time on stream, the activity slowly incre...