SCR diesel particle filter with oxidation catalyst and oxygen storage catalyst loadings, and exhaust system including the same

A particle filter comprising

• a selective catalytic reduction (SCR) catalyst that, when in the presence of a reducing agent, promotes selective catalytic reduction of nitrogen oxides;
• an oxidation catalyst (OC) component that promotes oxidation of hydrocarbons and carbon monoxide;
• and
• an oxygen storage catalyst (OSC) component that alternates between adsorbing and storing oxygen and desorbing and releasing oxygen when exposed to oscillating rich and lean exhaust conditions, the OSC component comprising a material that lowers the oxidation temperature for soot that comes in contact with said material, wherein
• the SCR catalyst, the OC component, and the OSC component are each present in a coating provided on the particle filter in an arrangement whereby, upon delivering an exhaust gas stream comprising nitrogen oxides (NOx) and ammonia (NH3) into an inlet end of the particle filter, there is promoted an initial contact of the NOx and the NH3 with the SCR catalyst prior to an initial contact of the NOx and the NH3 with the OC component and the OSC component, and
• the arrangement of the coating is one whereby a portion of the filter body that is occupied by the OSC component is greater than a portion of the filter body that is occupied by the OC component, while some amount of the SCR catalyst is present over substantially the entire length of the particle filter.