碳纳米管负载非晶态镍磷的催化性能研究

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1、南昌大学博士学位论文碳纳米管负载非晶态镍磷的催化性能研究姓名：居艳申请学位级别：博士专业：工业催化指导教师：李凤仪20051101南昌大学博士论文Abstractcarbonnanotubes(CNTs)weresynthesizedfromdecompositionofmethaneoverthreenickel．basedcatalystspreparedbyco．precipitationmethod．Experimentalresultsshowedthatthenatureofcatalystscouldaffecttheyield，microstructures，morphol

2、ogyandpropertiesofCNTsthatwerecharacterizedbyXRD．TEM，BETandTGTheadditionofsodiumcarbonateintoNi—Cu．A1catalystbroughtaboutslightdecreasesintheyieldofCNTsand1edtothemorphologychangefrombamboo．shapedCNTsto1arge—inner．diameterCNTs．Thesodiumcarbonateaddedinsystemplayedanimportantroleincontrollingthemor

3、phologyofCNTs．ChemicalvaDordepositiontechniquebasedonporousanodicaluminumoxide(AAO)templatewasappliedforsynthesizinghighlyalignedcarbonnanotubearrays．ThechanneldiameterofAA0．therebythediameterofCNTsinsidethechannels．couldbeeasilyregulatedbyalteringanodizationvoltage．AmorphousNiP／CNTscatalystwaspre

4、paredbyinducedreduction．inwhichH3P02wasusedasthereducingagent，andaminewasusedtoadjustthepHvalueofthesolution．BenzenehydrogenationwasusedasaprobereactionforthestudyofeffectofdifferenttreatmenttoCNTsandpreparationconditionsoncatalyticactivityofamorphousNiP／CNTscatalyst．CatalystswerecharacterizedbvXR

5、D，TEM，ICP，TPR，XPS，H2-TPDandDTA．Theeffectofsupport-CNllsandrareearthelementsoncatalyticactivityandthethermalstabilitywerediscussed．ExperimentalresultsshowedthatCNTsoxidizedbvHN03oractivatedbVKOHresultedinimprovementsincatalyticactivityofamorphousNiP／CNTscatalyst，andpreparationconditionscouldaffecti

6、tscatalyticactivitytosomeextent．NiPsupportedonCNTsbelongedtoamorphousstructure．TheparticlesizeofNiPalloysupportedonCNTsbecamesmaller．Itsdispersionsandthespecificsurfaceareaincreasedremarkably．InamorphousNiP／CNTscatalyst，bothphosphorusandCNTscoulddonateelectronstonickel，makingNielectron—rich．Thered

7、uctionoftheelectron．richNibecameeasyandthestrengthofhydrogenadsorptionsonitwasweakenedThecatalyticactivityofbenzenehydrogenationforNiP／CNTscatalystwaslowerthanthatforamorphousNiPalloy，butitsspecificactivitywashig