Applied as chemical mechanical planarization (CMP) slurry for semiconductor silicon wafer polishing, oxygen storage component in three-way catalytic converters for automotive exhaust treatment, UV absorber in sunscreen and cosmetic formulations with antioxidant properties, solid electrolyte in intermediate-temperature solid oxide fuel cells, glass polishing compound for precision optical lenses and mirrors, diesel fuel additive to reduce soot emissions and improve combustion efficiency, neuroprotective agent in biomedical research for treating oxidative stress, corrosion-resistant coatings for marine and industrial applications, gas sensors for oxygen detection, and photocatalytic coatings for self-cleaning surfaces. The redox-active Ce3+/Ce4+ transitions provide exceptional catalytic and protective performance.