NOx STORAGE REDUCTION CATALYST FOR PURIFYING EXHAUST GAS AND EXHAUST GAS PURIFICATION METHOD USING SAID CATALYST

摘要

The present invention is to provide a NOx storage reduction catalyst for purifying exhaust gas capable of efficiently removing carbon monoxide (CO), a hydrocarbon (HC), and a nitrogen oxide (NOx), in particular NOx, which are harmful components contained in exhaust gas. The NOx storage reduction catalyst for purifying exhaust gas of the present invention is characterized by being obtained by using a complex oxide of strontium and cerium as a catalytic active component, in which the complex oxide of strontium and cerium adsorbs 1.0 mL or less of oxygen per gram in a 400° C. atmosphere, and sinters a precursor at 300° C. or more.

主权项

1. A NOx storage reduction catalyst for purifying exhaust gas, comprising a complex oxide of strontium and cerium.