%0 Journal Article
%T (La0.8A0.2)MnO3(A=Sr,K)perovskitecatalystsforNOandC10H22oxidationandselectivereductionofNObyC10H22
%A Anne Giroir-Fendler
%A Sonia Gil
%A Alexandre Baylet
%J ´ß»¯Ñ§±¨
%P 1299-1304
%D 2014
%R 10.1016/S1872-2067(14)60173-X
%X £¿Inthiswork,westudiedthecatalyticactivityofLaMnO3and(La0.8A0.2)MnO3(A=Sr,K)perovskitecatalystsforoxidationofNOandC10H22andselectivereductionofNObyC10H22.Thecatalyticperformancesoftheseperovskiteswerecomparedwiththatofa2wt%Pt/SiO2catalyst.TheLasitesubstitutionincreasedthecatalyticpropertiesforNOorC10H22oxidationcomparedwiththenon-substitutedLaMnO3sample.Forthemostefficientperovskitecatalyst,(La0.8Sr0.2)MnO3,theresultsshowedthepresenceoftwotemperaturedomainsforNOadsorption:(1)adomaincorrespondingtoweaklyadsorbedNO,desorbingattemperatureslowerthan270¡æand(2)aseconddomaincorrespondingtoNOadsorbedonthesurfaceasnitratespecies,desorbingattemperatureshigherthan330¡æ.FortheSr-substitutedperovskite,themaximumNO2yieldof80%wasobservedintheintermediatetemperaturedomain(around285¡æ).InthereactantmixtureofNO/C10H22/O2/H2O/He,(La0.8Sr0.2)MnO3perovskiteshowedbetterperformancethanthe2wt%Pt/SiO2catalyst£ºNO2yieldsreaching50%and36%at290and370¡æ,respectively.ThisactivityimprovementwasfoundtobebecauseofatomicscaleinteractionsbetweentheAandBactivesites,Sr2+cationandMn4+/Mn3+redoxcouple.Thus,(La0.8Sr0.2)MnO3perovskitecouldbeanalternativefreenoblemetalcatalystforexhaustgasaftertreatment.
%K LaMnO3substitutedperovskite
%K Nitrogenoxideoxidation
%K Decaneoxidation
%K Hydrocarbons-selectivecatalyticreduction
%U http://www.chxb.cn/CN/abstract/abstract21421.shtml