| abstract |
A catalyst for cleaning the exhaust gases of internal combustion engines with improved cold start behavior and improved lean fatigue strength with a reduced specific precious metal load is presented. He uses active alumina provided with conventional promoters as a carrier and platinum and / or palladium and rhodium in customary amounts as noble metals. In addition, it contains one or more base metals in quantities up to 5 times the mass of the entire precious metal, which are brought into the immediate vicinity of the rhodium by a special manufacturing technique. |