Patent ID: 8940657
Filing Date: 2015-01-27
Classification: B01D,B01J,F01N,Y02T,Y10S

Abstract:
1. An exhaust emission control catalyst comprising: a substrate; and a catalytic layer that is formed on a surface of the substrate, wherein the catalytic layer comprises a rhodium catalytic layer, which includes a first carrier and rhodium supported on the first carrier, and a platinum catalytic layer, which includes a second carrier and platinum supported on the second carrier, the first carrier in the rhodium catalytic layer includes CeO a relationship between a mole average (X) of a Pauling's electronegativity that is calculated as to elements included in the rhodium catalytic layer except platinum group elements and oxygen and a mole average (Y) of a Pauling's electronegativity that is calculated as to elements included in the platinum catalytic layer except platinum group elements and oxygen is 1.30≦X≦1.45 and 1.47≦Y≦2.0.