EXHAUST GAS CLEANING CATALYST

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas cleaning catalyst having an activity per unit weight of a noble metal enhanced by efficiently using the noble metal without increasing cost and thus having an improved life.

SOLUTION: Pd is carried by combined oxides. The combined oxides have the rational formula of MXO3(wherein M represents an alkali metal element and X represents a group V element) and a crystalline structure of Perovskite structure.

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