Differences in Catalytic Sites for CO Oxidation and Propylene Epoxidation on Au Nanoparticles

Sintering and increased Au loading of Au/TS-1 causes the rate of CO oxidation per mole of Au to increase, whereas that for epoxidation of propylene in O-2 and H-2 decreases. This opposite trend in rate behavior shows that the catalytic sites for the two reactions must be different.