Abstract
Small silver nanoparticles (less than 7nm) supported on silica as well as silica modified with CeO2 were prepared by impregnation techniques, characterized by physical-chemical methods, and tested in dehydrogenation of ethanol into acetaldehyde. The addition of CeO2 was shown to increase the catalytic activity of the Ag/SiO2 catalyst. The close interaction of the CeO2 nanoparticles (3–5nm) with supported silver nanoparticles increased the activity of the Ag/CeO2/SiO2 catalyst in both dehydrogenation and oxidative dehydrogenation of ethanol into acetaldehyde due to participation of the Ag-CeO2 interface in the ethanol activation or/and the spillover of active oxygen.
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