Nowadays, environmental pollution is a widely discussed problem which is reaching alarming levels worldwide. The catalytic oxidation has proved to be one of the most performing techniques for the pollutants abatement coming from both mobile and stationary sources. The engineering of several synthesis methods and the evolution of characterization procedures are fundamental to the choice of the correct catalytic system for any applications. Among these, ceria-based systems play an essential role in the oxidation reactions due to their unique and peculiar redox properties. They can store and release oxygen in a quick and easy way due to the presence of the Ce4+/Ce3+ pair while maintaining good structural stability even if operating in complex systems such as the soot abatement.