Ag/La-CeO2 for Low Temperature PM Oxidation

Ag/CeO₂ is known for great oxidation performance by promoting active oxygen species generation which is efficient for PM oxidation at a low temperature. It is also known that the doping of the La on the CeO₂ surface increases the oxygen deficiency and thermal sustainability of the catalyst. In this study, catalysts were synthesized by loading both Ag and La into CeO₂, and oxidation experiments with Printex®U were performed to compare with Ag/CeO₂ catalyst which has no La loading. PM oxidation experimental and various analysis including XPS and Raman were done to prove enhanced oxidation ability of new catalysts. It is concluded that La does not only improve oxidation of the catalysts, but also effect form of Ag particle loaded in the catalysts.