Novel Pd-based three-way catalysts

Abstract

ABSTRACT Three-way catalyst development programs focusing on processing precious metals on washcoats and on the application of the precious metals on certain washcoat components were initiated with the goal of improving the performance of three-way catalysts so as to fulfill the planned future emission standards with reduced precious metal costs. The different programs included newly developed Pd-only and Pd/Rh catalysts and novel oxygen storage components. The research programs resulted in the development of novel preparation techniques for exhaust catalysts, which led to a general improvement of catalyst performance. Besides the enhancement in activity the new preparation techniques make it possible to be more flexible and prepare tailor-made catalysts. The application of the new techniques for the preparation of novel oxygen storage components led to a further increase in catalyst performance despite the lower amount of oxygen storage components used.