Development of Reduced PGM Three-Way Catalysts Enhanced NOx Purifying Activity

Abstract

In response to the growing awareness for environmental protection, automobile emissions regulations are gradually becoming more stringent all over the world. Moreover, the amount of precious metals used for automobile catalysts is required to decrease in order to lower the consumption of natural resources. As a consequence, further improvements to catalysts which contribute to a decrease in the amount of precious metals used while satisfying emission regulations are greatly needed. In this report, with the application of nanoparticle rhodium (Rh) clusters along with a high thermal stabilized pyrochlore-ceria/zirconia (CZ) catalyst, high performance three-way catalyst has been developed. Moreover, a zone coat strategy has been developed which improves cold start catalytic performance.