| abstract |
Described is an ammonia slip catalyst comprising an SCR catalyst and an oxidation catalyst comprising at least two metals, each selected from a specific group, and a substrate having at least one oxidation catalyst therein. The ammonia slip catalyst may have two layers, one of the layers containing an SCR catalyst, a second layer containing the oxidation catalyst comprising at least two metals each selected from a specific group, and the ammonia slip catalyst containing no platinum group metal. Methods for making and using the ammonia slip catalyst to reduce ammonia slip are described. |