EXHAUST GAS PURIFICATION CATALYST AND APPARATUS FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas purification catalyst having excellent durability capable of maintaining a high NOx purification capacity by physically suppressing both movements via a gas phase of a NOx complementary component (especially, alkaline metal) and a solid phase.

SOLUTION: The gas purification catalyst is provided with a dense layer between a cordierite substrate and a support layer formed by carrying a catalytic active component.

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