Practical Use and High Functionalization of High Heat Resistance Pyrochlore Type CeO₂-ZrO₂ Oxygen Storage Material

Abstract

Pyrochlore type CeO₂-ZrO₂ materials with high heat resistance of crystal structure have been put into practical use to impart “slow and high” oxygen storage capacity to catalyst. Further improvement over three generations realized high functionalization, and it succeeded in greatly improving NOx purification function. The reduction of precious metal amount in the catalyst was achieved by the development material.