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催化学报  2014 

PureandNi-substitutedCo3O4spinelcatalystsfordirectN2Odecomposition

DOI: 10.1016/S1872-2067(14)60058-9, PP. 1105-1112

Keywords: Nitrousoxidedecomposition,Spinel,Cobaltoxide,Greenhousegas,Nickelcobaltite

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Abstract:

?AseriesofNixCo1-xCo2O4(0≤x≤1)spinelcatalystswerepreparedbytheco-precipitationmethodandusedfordirectN2Odecomposition.Thedecompositionpathwayoftheparentprecipitateswascharacterizedbythermalanalysis.Thecatalystswerecalcinedat500℃for3handcharacterizedbypowderX-raydiffraction,Fouriertransforminfrared,andN2adsorption-desorption.NickelcobaltitespinelwasformedinthesolidstatereactionbetweenNiOandCo3O4.TheN2OdecompositionmeasurementrevealedsignificantincreaseintheactivityofCo3O4spineloxidecatalystwiththepartialreplacementofCo2+byNi2+.TheactivityofthisseriesofcatalystswascontrolledbythedegreeofCo2+substitutionbyNi2+,spinelcrystallitesize,catalystsurfacearea,presenceofresidualK+,andcalcinationtemperature.

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