abstract |
The present invention relates to a catalyst capable of simultaneously removing nitrogen oxide and particulate matter discharged from a diesel engine, and a method for preparing the same, wherein 1-XY: X: Y: 1 (X and Y are 0 to 1, and X + Y 0 to 1) molar ratio of La nitrate or its hydrate, Cs nitrate or its hydrate, Ce nitrate or its hydrate, and Co nitrate or its hydrate are mixed with nitric acid and dissolved in water to make a solution. And a lanthanoid of general formula La1-XMXCoO3, wherein X is 0 to 1 and M is Cs or Ce, and the lanthanoid-based perovskite catalyst is composed of drying and calcining. It is characterized by a perovskite catalyst. |