简介：Theyolk-shellLaMnO3perovskitemicrosphereswerefabricatedbyanovel,simpleandmildsofttemplateapproach.Aseriesoftemplate-P123concentrations(0-6.12mmol·L^-1)wereemployedtooptimizethemostcompletespheres.WhentheconcentrationofP123is3.0mmol·L^-1,theobtainedyolk-shellmicrosphereswithadiameterof200-700nmwereconstructedbynanoparticles.Thepossibleformationmechanismoftheyolk-shellmicrosphereswasrevealedstepbystepviaXRD,SEM,TEM,EDSandHRTEM.MoleculesofP123weresuitablymixedwithsolventsfordoubleshelledvesiclesthroughself-assembly,whichinteractedwithmetalcomplexestoformP123-metalvesicles.AftertheremovalofP123andcitricacidbycalcinationat700℃,theyolk-shellLaMnO3microsphereswiththrough-channelswereobtained.Through-channelsonthesurfacewereduetocitricacidandthesolidcorewasattributedtotheshrinkofinnervesicles.Preparedyolk-shellmicrospheresamplespossessedalargersurfaceareaandahighermaximumNOconversionvalueof78%at314℃forNOoxidation,comparedwithsampleswithouttheyolk-shellstructure.

简介：Au/Ce1xZrxO2catalysts(x=0-0.8)werepreparedbyadeposition-precipitationmethodusingCe1xZrxO2nanoparticlesassupportswithvariableCeandZrcontents.TheirstructureswerecharacterizedbycomplimentarymeanssuchasX-raydiffraction,Raman,scanningtransmissionelectronmicroscopyandX-rayphotoelectronspectroscopy(XPS).TheseAucatalystspossessedsimilarsizesandcrystallinephasesofCe1xZrxO2supportsaswellassimilarsizesandoxidationstatesofAunanoparticles.TheoxidationstateofAunanoparticleswasdominatedbyAu0especiallyinCOoxidation.TheiractivitieswereexaminedinCOoxidationatdifferenttemperaturesintherangeof303333K.TheCOoxidationratesnormalizedperAuatomsincreasedwiththeincreasingCecontents,andreachedthemaximumvalueoverAu/CeO2.Suchchangewasinparallelwiththechangeintheoxygenstoragecapacityvalues,i.e.theamountsofactiveoxygenspeciesonAu/Ce1xZrxO2catalysts.TheexcellentcorrelationbetweenthetwopropertiesofthecatalystssuggeststhattheintrinsicsupporteffectsontheCOoxidationratesisrelatedtotheeffectsontheadsorptionandactivationofO2onAu/Ce1xZrxO2catalysts.SuchunderstandingonthesupporteffectsmaybeusefulfordesigningmoreactiveAucatalysts,forexample,bytuningtheredoxpropertiesofoxidesupports.

简介：

简介：Forthegoalofsulfurrecovery,mostmethodsareaimedatthetailgaswithhigh-concentrationH2S,butfeweffectivemethodsareusedforlow-concentrationH2S.Inthiswork,Low-concentrationH2Scouldbepurifiedwellbyliquidphasecatalyticoxidation(LCO),andthesulfurresourcecouldalsoberecovered.TheabsorptionsolutionwaspreparedbyFeCl3andsulfosalicylicacid.Undertheexperimentalconditions,theconversionofH2StoScouldbemaintainedabove94%at60℃.InordertoenhancetheeconomicalefficiencyofLCOmethod,theabsorptionsolutionwasmodifiedbydopingCe,andaseriesofexperimentsweredesignedtoinvestigateitsperformance.TheresultsshowedthattheconversionofH2Shadnoobviousimprovement,butabove98%conversioncouldbegainedat60℃,andtheH2Sconversionratewasenhanced.TheoptimumadditionqualityofCe(NO3)3was0.08gto50mlFe3+solution.

简介：InAugust2008thenewtechnologyformanufactureofpro-pyleneoxidethroughdirectoxidationofpropylenebyhy-drogenperoxidedevelopedbyDalianInstituteofChemicalPhysics(DICP),CAShaspassedtheexperts'appraisalor-ganizedbytheScienceandTechnologyDepartmentofLiaoningProvince.Itistoldthatthisnewtechnology,beinganenvironmentallyfriendlynewprocess,willeventuallyput

简介：我们在甲烷(POM)的部分氧化上调查了填满的格子氧的锻烧温度，反应温度，和不同数量的效果到把perovskite类型LaFeO3氧化物用作氧施主而不是气体的氧的合成气体，它被大音阶的第五音胶化方法准备，并且氧化物被XRD，TG/DTA，和赌注描绘。结果显示粒子尺寸增加了，锻烧温度增加，当赌注和CH4变换衰退了，锻烧温度当气体的氧不在时作为氧施主用LaFeO3氧化物增加时。在象上面那样的高水平仍然是的公司选择92%，并且当锻烧温度增加了，稍微增加了。到甲烷空气的LaFeO3氧化物的暴露提高了氧迁居在有由于格子氧和氧化说的Fe离子的减小的损失联机的时间的体积同时。高反应温度对从向为有高公司选择的合成气体生产的表面的体积的氧种类的迁居有利。为由顺序的氧化还原作用反应的POM的产品分发和进化被填满的格子氧的数量与气体的氧决定。最佳的过程应该衰退甲烷的全部的氧化，和增加甲烷的部分氧化的选择。

简介：Anovelcovalentlymodifiedglassycarbonelectrodewithβ-cyclodextrinwaspreparedviaelectropolymerizationtechniqueforthesimultaneousdeterminationofuricacid(UA),xanthine(XA),hypoxanthine(HX)anddopamine(DA).ThisnewelectrodepresentedanexcellentelectrocatalyticactivitytowardstheoxidationofUA,XA,HXandDAbycyclicvoltammetry(CV)method.Theoxidationpeaksofthefourcompoundswerewelldefinedandhadtheenhancedpeakcurrents.TheseparationpotentialsoftheoxidationpeaksforDA-UA,UA-XAandXA-HXwere150,390and360mVinCV,respectively.Bymeansofdifferentialpulsevoltammetry(DPV)method,thecalibrationcurvesintherangesof10―225,5―105,10―170and5―150μmol/LwereobtainedforUA,XA,HXandDA,respectively.Thelowestdetectionlimits(S/N=3)were5,1.25,5and1.5μmol/LforUA,XA,HXandDA,respectively.ThepracticalapplicationofthemodifiedelectrodewasdemonstratedbythedeterminationofDAinhydrochlorideinjectionandUA,XA,HXinhumanurinesamples.

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简介：ＮＯＶＥＬＯＸＩＤＡＴＩＯＮＯＦＨＥＸＡＢＥＮＺＹＬＨＥＸＡＡＺＡ－ＩＳＯＷＵＲＴＺＩＴＡＮＥＢＹＭｅ２ＣＨＮＯ２／ＣｕＣｌ／Ｐｙ／Ｏ２ＸｉａｏＰｅｉＧＵＡＮ；ＨｏｎｇＹＡＮ；ＪｉａｎＧｕａｎｇＳＵＮ；ＹｏｎｇＺｈｏｎｇＹＵ(ＳｃｈｏｌｏｆＣｈｅ?..

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简介：Theaerobicoxidationofglycerolprovidesaneconomicallyviableroutetoglyceraldehyde,dihydroxyacetoneandglycericacidwithversatileapplications,forwhichmonometallicPt,AuandPdandbimetallicAu–Pt,Au–PdandPt–PdcatalystsonTiO2wereexaminedunderbase-freeconditions.PtexhibitedasuperioractivityrelativetoPd,andAu–PdandPt–PdwhileAuwasessentiallyinactive.ThepresenceofAuontheAu–Pt/TiO2catalystsledtotheirhigheractivities(normalizedperPtatom)inawiderangeofAu/Ptatomicratios(i.e.1/3–7/1),andtheonewiththeAu/Ptratioof3/1exhibitedthehighestactivity.SuchpromotingeffectisascribedtotheincreasedelectrondensityonPtviatheelectrontransferfromAutoPt,ascharacterizedbythetemperature-programmeddesorptionofCOandinfra-redspectroscopyforCOadsorption.Meanwhile,thepresenceofAuonAu–Pt/TiO2,mostlikeduetotheobservedelectrontransfer,changedtheproductselectivity,andfacilitatedtheoxidationofthesecondaryhydroxylgroupsinglycerol,leadingtothefavorableformationofdihydroxyacetoneoverglyceraldehydeandglycericacidthatwerederivedfromtheoxidationoftheprimaryhydroxylgroups.ThesynergeticeffectbetweenAuandPtdemonstratesthefeasibilityintheefficientoxidationofglyceroltothetargetedproducts,forexample,byrationaltuningoftheelectronicpropertiesofmetalcatalysts.

简介：以便执行decolorization，污泥蛋白质答案，黑暗棕色的结束到从激活的污泥的黑答案，面对氢受到60Co光线照耀过氧化物。UV/Visspectrophotometric方法被用来在着色法上调查H2O2的效果在光线照耀下面的污泥蛋白质答案的明显的动力学和率常数。另外，照耀剂量，起始的污泥蛋白质答案集中，和pH的效果在污泥蛋白质答案的decolorization效率上珍视被学习。结果证明污泥蛋白质答案的明显的动力学是的decolorization一阶的反应。答案decolorization百分比随照耀剂量的增加或起始的污泥蛋白质答案集中的减少增加了。pH价值的考试结果证明污泥蛋白质解决方案能更高效地比在酸媒介在碱的媒介被将脱色。而且，感觉评估和foamability分析显示在H2O2氧化下面的照耀的样品显示出更好感觉的分数和foamability。

简介：Microstructureof316LNstainlesssteel(ss),includingtheas-receivedmaterialandsamplesprocessedbysolutionannealtreatmentandstressrelieftreatmentafterforging,wascharacterizedbyVickershardness(HV)testingandelectronbackscatteringdiffraction(EBSD).Theoxidefilmformedonsamplesafterimmersioninboratedandlithiatedwaterat583.15Kwasinvestigatedbyscanningelectronmicroscopy(SEM)andX-rayphotoelectronspectroscopy(XPS).Resultsshowedthatthegrainsizeofsampleswaslargelyreducedafterforging.Higherfractionofcoincidencesitelattice(CSL)boundariesandlowerresidualstrainwereobservedinsampleswitheithersolutionannealtreatmentorstressrelieftreatment.TheproportionofCSLboundarieswaslargelyenhancedbysolutionannealtreatmentafterforging,duetotherecrystallizationoccurringduringsolutionannealtreatment.Theoxidefilmgrownon316LNsswithsolutionannealtreatmentafterforgingexhibitedmorestrongprotectiveness,ascomparedtotheoxidefilmgrownonsampleswithstressrelieftreatmentafterforgingandtheoxidefilmgrownonasreceivedsampleswithoutforging.Themechanismsofoxidationwerethendiscussed.

简介：ThreeseriesofCeO2/CuOsampleswerepreparedbyimpregnationmethodandcharacterizedbyXRD,N2adsorption-desorption,temperatureprogrammedreduction(TPR),XPSandTEMtechniques.IncomparisonwiththesamplespreparedwithCuOasinitialsupport,thesampleswithCu(OH)2asinitialsupporthavehigherreducibilitiesandsmallerrelativeTPRpeakareas,andalsolargerspecificsurfaceareasatcalcinationtemperaturesof400℃–600℃.Asaresult,Cu(OH)2isbetterthanCuOasinitialsupportforpreferentialoxidationofCOinexcessH2(CO-PROX).Thebestcatalyticperformancewasachievedonthesamplecalcinedat600℃andwithanatomicratioofCe/Cuat40%.XPSanalysesindicatethatmoreinterfacelinkagesCe-O-Cucouldbeformedwhenitwascalcinedat600℃.AndtheatomicratioofCe/Cuat40%ledtoaproperreducibilityforthesampleasillustratedbytheTPRmeasurements.

简介：CarbonmonoxideoxidationonPd(10w.t.%)-aluminawasstudiedbyin-situinfraredspectroscopy.ItwasfoundthattheoxidationreactivitiesvarywithdifferentCOadspecies:linearCOad>2-foldbridgedCOad>multi-bridgedCOad.

简介：AseriesofCe-Fe-Zr-O(x)/MgO(xdenotesthemassfractionofCe-Fe-Zr-O,x=10%,15%,20%,25%,30%)complexoxideoxygencarriersforselectiveoxidationofmethanetosynthesisgaswerepreparedbytheco-precipitationmethod.ThecatalystswerecharacterizedbymeansofX-raydiffractionandH2-TPR.TheXRDmeasurementsshowedthatMgFeO4particleswereformedandFe2O3particleswelldispersedontheoxygencarriers.Thereactionsbetweenmethanedilutedbyargon(10%CH4)andoxygencarrierswereinvestigated.SuitablecontentofCeO2/Fe2O3/ZrO2mixedoxidescouldpromotethereactionbetweenmethaneandoxygencarriers.Therearemainlytwokindsofoxygenofcarriers:surfacelatticeoxygenwhichhadhigheractivitybutlowerselectivity,andbulklatticeoxygenwhichhadloweractivitybuthigherselectivity.Amongallthecatalysts,Ce-Fe-Zr-O(20%)/MgOexhibitedthebestcatalyticperformance.Theconversionofthemethanewasabove56%,andtheselectivityoftheH2andCOwerebothabove93%,theratioofH2/COwasstableandapproachedto2foralongtime.

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简介：Micro-arcoxidation(MAO)processwascarriedoutinanoptimizeddualelectrolytesystemtofabricateacompact,smooth,andcorrosionresistantcoatingonZK60Mgalloy.Themicrostructuralcharacteristicsofcoatingwereinvestigatedbyscanningelectronmicroscopy(SEM)coupledwithanenergydispersivespectrometer(EDS)andX-raydiffraction(XRD).Testofmasslosswasconductedata3.5%NaClsolutiontoassesstheresistancetocorrosion.ThebondingstrengthbetweenthecoatingandZK60substratewasevaluatedusingscratchexperiment.TheresultsrevealthatMgAl2O4andMgOarethemainphasesofceramiccoatingobtainedinthedualelectrolytesystem.Thecorrosionrateofcoatingpreparedintheoptimizeddualelectrolyteisonly0.0061gám-2áh-1,whichdemonstratesexcellentcorrosionresistance.Thisismainlyduetothecompact,uniformcoatingwithhighbondingstrength.

简介：Byusingsurfaceeffects（Augerelectronspectroscopy,X-rayphotoelectronspectroscopy,polarKerreffect）andvolumeeffects（magnetization,torquecurve）thephysicalprocessofsurfaceoxidationofrareearth-transitionmetalamorphousmagneto-opticalthinfilmswasstudiedinthispaper.Therareearthelementsoxidizepreferentiallyandrichatthefilmsurface,andthetransitionmetalsdepleteinoxidationlayer.Fe2O3inthesurfaceoxidationlayercontributestotheplanarmagnetization,andtherebytheanomalouspeakappearsnear180°onthetorquecurvesandtheamplitudeofthepeaksisrelatedtothedepthofsurfaceoxidationlayers.Theironbondstooxygeneasierthanthecobolt.RE-Comagneto-optiealthinfilmshavegoodpropertiesofresistancetooxidationandhumidity.

简介：试图为高温度的熔融的盐反应堆的安装和电极的建设开发材料，在750和950湩爠晥湩浥湥?瑳敲杮桴湥湩?猠汯摩猠汯瑵潩?瑳敲杮桴湥湩?眠牯?慨摲湥湩?愠摮瀠敲楣楰慴楴湯猠牴湥瑧敨楮杮的Ni-11Fe-10Cu的高温度的氧化行为上的艾尔和Y的效果