| abstract |
A catalyst article comprising a substrate having a catalyst coating on a surface, wherein the catalyst coating comprises a catalyst layer; wherein the catalyst layer comprises a noble metal component on carrier particles, wherein the carrier particles comprise micron-scale particles and nanoscale Having a bimodal particle size distribution including The catalyst product is very effective in treating the exhaust stream of an internal combustion engine. The article provides a first mixture comprising micron-scale carrier particles; providing a second mixture comprising nanoscale carrier particles and a noble metal component and having an initial pH; It is manufactured by a method including mixing a second mixture; applying the obtained mixture to a substrate to form a catalyst layer; and calcining the substrate. |