The effect of doping CuO on the structure and properties of zirconia-ceria mixed oxide was studied. The results show that addition of CuO decreases the reduction temperature of ceria, and stabilizes the cubic structure of mixed oxides, and enhances catalytic activity of CuO-ZrO-CeO2 mixed oxides for CO oxidation. Increasing ceria content in the mixed oxides can enhance the catalytic activity, but some impurities such as sulfate make catalytic activity falling. There is little effect of calcination temperature on catalytic activities, implying that these catalysts are effective with good thermal stability.
参考文献
| [1] | TROVERELLI A;Zamar F;Llorca J et al.Nanophase fluorite-structured CeO2-ZrO2 catalysts prepared by high-energy mechanical milling[J].Journal of Catalysis,1997,169:490. |
| [2] | Hori C E;Perman H;Simon K Y et al.Thermal stability of oxygen storage properties in a mixed CeO2-ZrO2 system[J].Applied Catalysis B:Environmental,1998,16:105. |
| [3] | Fornasiero P;Kaspar;Grsziani .Redox behavior of high syrface area Rh-loaded Ce0.5Zr0.5O2 mixed oxide[J].Journal of Catalysis,1997,167:576. |
| [4] | Boccuzzi F.;Gargano M.;Ravasio N.;Chiorino A. .PREPARATION, CHARACTERIZATION, AND ACTIVITY OF CU/TIO2 CATALYSTS .2. EFFECT OF THE CATALYST MORPHOLOGY ON THE HYDROGENATION OF 1,3-CYCLOOCTADIENE AND THE CO-NO REACTION ON CU/TIO2 CATALYSTS[J].Journal of Catalysis,1997(2):140-149. |
| [5] | Tsohope A;Liu W;Fiytzani-stephanoloulos M et al.Redox activity of nan stoichiometric ceria oxide-based nanocrystalline catalysts[J].Journal of Catalysis,1995,157:42. |
| [6] | TROVERELLI A .Catalytic properties of ceria and ceria-containing materials[J].Catalysis Review-Science and Engineering,1996,38:439. |
| [7] | Luo M .Catalytic properties and structure of CeO2 and Ce0.5Zr0.5O2-supported CuO or Pd catalysts[D].Hangzhou:Zhejiang University (in Chin),1998. |
| [8] | Kundakovic L.;Flytzani-Stephanopoulos M. .Cu- and Ag-modified cerium oxide catalysts for methane oxidation[J].Journal of Catalysis,1998(1):203-221. |
| [9] | Luo MF.;Zheng XM.;Zhong YJ.;Wu TH.;Lu GL. .Redox properties of CexZr1-xO2 mixed oxides prepared by the sol-gel method[J].Journal of Materials Science Letters,1998(18):1553-1557. |
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