AseriesofmesoporousCu-Mn-Al2O3(CMA)materialswassynthesizedatmoderatetemperatureandtheirstructureswerecharacterizedbyXRD,N2physicaladsorptionandTPRtechniques.Itwasfoundthatusingmetalcomplexion[Cu(NH3)42+-Mn(NH3)62+]asrawmaterialsiseasiertoformgood-structuremesoporousCu-Mn-Al2O3materialsthanusingitsnitratesalt[Cu(NO3)2-Mn(NO3)2].TheTPRtestsresultsindicatethatCuOandMnOxwerehomogeneouslydispersedinthemesoporousmaterials.TheircatalyticapplicationtopreferentialcatalyticoxidationofCOinahydrogen-richstreamwasstudied.TheactivityvariesintheorderofCMA(1:1,molarratio)>CMA(1:2)>CMA(2:1)>CMA(CP)>CMA(1:0)≈CMA(0:1).TheCMA(1:0)andCMA(0:1)haveloweractivitycomparedtoothersamples,implyingthatthereexistedcoordinationeffectbetweenCu-Mninthesamples.TheselectivityvariedintheorderofCMA(0:1)≥CMA(1:2)>CMA(1:1)>CMA(2:1)>CMA(1:0)athighertemperature(≥120°C),indicatingthatincreasingtheCucontentenhancedtheconversionofH2.ThesampleCMA(CP)madebycoprecipitationmethodhasalowerCOoxidationactivityandselectivitythanitscounter-partsofmesoporousCu-Mn-Al2O3materials[CMA(1:2)],thisattributedtothelowersurfaceareaoftheformerandpoorinteractionofCuOwithMnOx.
