| 摘要 |
PURPOSE:To obtain an oxidation catalyst excellent in heat resistance which is hardly sintered even at a high temp. by using a lanthanum manganite perovskite-type oxide of specified compsn. CONSTITUTION:A lanthanum manganite perovskite-type oxide expressed by La1-xAxMn1-alphaO3 (wherein 1<=x<=0.6, A is one or more kinds of elements selected from Ca, Sr and Ba, and alpha>0) is used as the oxidation catalyst for the combustion of gas such as hydrogen, carbon monoxide and hydrocarbon. This oxidation catalyst is prepared by compounding a small amt. of Mn2O3 and then calcined to cause Mn shortage. Thereby, the obtd. catalyst is excellent in heat resistance and is hardly sintered even at a high temp. |
