CATALYST FOR PURIFICATION OF EXHAUST GAS, AND PROCESS FOR PRODUCTION THEREOF

摘要

Provided is a technique that makes it possible to achieve a higher performance in purifying an exhaust gas. An exhaust gas-purifying catalyst according to the present invention includes a substrate, and a catalytic layer facing the substrate and including a precious metal, alumina, an oxygen storage material, and a sulfate of an alkaline-earth metal having an average particle diameter falling within a range of 0.01 to 0.70 µm, the average particle diameter being obtained by observation using a scanning electron microscope.