A monolithic series of Cu-Mn-Ce oxides supported on cordierites with different Cu/Mn/Ce molar ratios were prepared by the in-situ sol-gel method without any binder.The catalysts were charactefized by scanning electron microscopy (SEM),energy dispersive spectrometer (EDS),X-ray diffraction (XRD),and Brunauer-Emmett-Teller method (BET) and examined in the catalytic combustion of volatile organic compounds (VOCs).The results showed that the well-dispersed nanometer particles of mixed oxides adhered firmly to the cordierite surface.Cu0.15Mn0.3Ce55/cordierite was identified as the most active catalyst.Compared with commercial Pd/Al2O3,Cu0.15Mn0.3Ce55/cordierite showed higher activities for the combustion of various types of VOCs,especially for oxy-derivative compounds which could be lighted off below 200 ℃.
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