| abstract |
The present invention provides a rare earth oxide-supported noble metal catalyst, specifically providing a catalyst that has high catalyst activity and can perform ammonia synthesis under mild conditions that can greatly increase the ammonia production activity per catalyst weight and per supported metal amount. Noble metal catalysts for rare earth oxides. The catalyst of the present invention is characterized in that ruthenium is supported in a layered form on a praseodymia carrier. The catalyst of the present invention can be obtained by the following method, that is, the praseodymium oxide precursor is calcined in the order of low temperature, medium temperature and high temperature to obtain praseodymium oxide, and after the above praseodymium oxide is stirred together with the ruthenium supply source in a solvent, the solvent is decomposed. Removal and calcination treatment. |