Catalytic Activity of Ag/CeO2 Nanocomposites in CO Oxidation

Ag/CeO2 nanocomposites with active component contents of 2, 5, and 10 wt % were synthesized. A distinctive feature of these composites is calcination after impregnation of the support with an AgNO3 solution under mild temperature conditions. The morphology, structure, and properties of the resulting composites were studied using transmission electron microscopy, electron diffraction, powder X-ray diffraction, inductively coupled plasma optical emission spectrometry, X-ray photoelectron spectroscopy, and Raman spectroscopy. The catalytic activity of the Ag/CeO2 nanocomposites was evaluated in the CO oxidation reaction. It was found that the main factor determining the activity of the Ag/CeO2 nanocomposites is the size of the Ag particles.