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Chemical Research in Chinese Universities ›› 1999, Vol. 15 ›› Issue (3): 258-266.

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Preparation, Characterization of Solid Solution La4BaCu5-xMnxO13+λ(x= 0—5) and Its Catalytic Activity in the Reduction of NO by CO

LIU Yu, YANG Xiang-guang, WU Yue   

  1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
  • Received:1998-09-14 Online:1999-08-24 Published:2011-08-17
  • Supported by:

    Supported by the National Natural Science Foundation of China.

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Abstract: A series of layered mixed oxides La4BaCu5-x Mnx O13+λ ( x =0—5) was prepared, characterized and used as catalysts for NO+CO reaction. It was found that all the samples were single phase having a structure with five-layered-perovskite. La4BaCu2Mn3O13+λ showed the highest activity in the title reaction, this could be attributed to the synergetic effect between Cu and Mn. The results of TPR, TPD and excess oxygen investigations confirmed that the Cu ion would be the active center. The displacement of the Cu ion by Mn caused the Cu ion to be more easily reducible and more content of excess oxygen, and it was beneficial to the activity of the catalyst. The reaction mechanism was also proposed.

Key words: Layered mixed oxide, La4BaCu5-X MnX O13+λ, NO reduction by CO