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Catalytic Activity of Nanocrystalline Manganese Oxides for CO Oxidation

Liu Yunping;Yuan Junjun;Lin Peiyan Zhang Manwei; Qian Yitai (a Department of Precision Machinery and Precision Instrumentation, b. Department of Chemical Physics,c. Department of Applied Chemistry, University of Science and Technology of China Hefei 23002  
Catalytic activity of three nanoctystalline MnO2, Mn2O3 and Mn3O4 powders for carbon monoxide oxidation reaction has studied via contrast with the corresponding coarsely-grained powders. Experimental results show that particale size has a great effect on the activity of catalysts and the activity of nanometer powders is much better than the corresponding coarsely-grained powders. After acycle of catalytic activity experiment, although the particle sizes of nanocrystalline manganese oxides grow to a certain extent, they still keept in nanometer level. This indicatesthat the nanocrystallinen manganese oxide powders arerelatively stable as catalysts for CO oxidation, so they canbe used as cheap and easily-get catalysts for CO conversion.
【CateGory Index】: O643.3
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