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简介：Afacilecatalysis-freemethodwasutilizedtosynthesizefunctionalneodymiumhexaboride(NdB6)nanowiresofsinglecrystalusingNdpowdersandBCl3asstartingmaterials.TheXRDpatternconfirmedthatasinglephaseNdB6couldbeobtained.Raman-spectraelucidatedtheactivevibrationalmodesofthehexaborides.TheTEMimagesclearlyshowedthatthehexaboridesweresubmicroninsizewithacubicmorphology.Thefieldemissionoftheseone-dimensionalNdB6nanowiresshowedalowfieldemissionturn-on(5.55V/μmatacurrentdensityof10μA/cm2),andhighcurrentdensitywithafieldenhancementfactorof1037.TheemissioncurrentdensityandtheelectricfieldfollowedtheFowler-Nordheim(F-N)relationship.Thegoodperformanceforfieldemissionwasattributedtothesingle-crystallinestructureandthenanowiregeometry.

简介：ThesinglecrystalgrowthofstoichiometrichostluminescentcrystalNa5Eu（WO4）4hasbeeninvestigated.UsingNa2WO4asaflux,theoptimumconditionstogrowapuresinglecrystalbyflux-slow-coolingmethodhavebeendetermined.Ahighopticalqualitysinglecrystalofdimention4.5mmhasbeengrown,whichisthelargestoneasweknowsofar.Themicro-hardnessofNa5Eu（WO4）4singlecrystalis3.46×103MPa.Itsrefractiveindexis1.81inwhitelightwavelengthregionandthespecificgravityis5.65g/cm3.Thefluorescentandexcitationspectrahavebeendeterminedandthereasonofthefluorescentquenchof5D2and5D1to7FjofEu3+canbeexplainedasmulti-phononnon-radiationtransition.

简介：Metalsilver(Ag)wasaddedintoSm0.5Sr0.5CoO3(SSC)bynitratepyrolysismethodtoobtainporouscathodematerial(SSC-Agx)forSOFC.ThecompositephasesinthesematerialsofSSC-AgxwereidentifiedbyX-raydiffraction.ThemicrostructureofanelectrodeonCe0.sSm0.2O1.9intermediatetempera-tureelectrolytebyspraymethod,polarizationcurveandtheimperaturepedancespectraatlowandintermediate(500-800℃)wereinvestigated.Theresultsshowthatthematerialcontaining20%Agexhibitsthebestelectrochemicalproperties,itstotalimpedanceofcathodeisonly1/11ofSSCat600℃,andaquarterofSSCsat750℃.Thecompositetech-niqueofcathodeSm0.5Sr0.5CoO3addedwithAgisanefficientmethodtoimprovethecathodeperformanceofSOFCsoperatingintherangeofintermediatetempera-ture.

简介：Pt-freecounterelectrode（CE）composedofLa2MoO6（La2O3-MoO3）wassuccessfullysynthesizedbysimplepyrolysisoflanthanumacetate（C6H9O6La·xH2O）andhexaammoniumheptamolybdatetetrahydrate(（NH4）6Mo7O24·4H2O).Furthermore,threeproportionscompositescatalystsofLa2MoO6@MWCNTsbasedonLa2MoO6andmultiwallcarbonnanotubes（MWCNTs）werepreparedandcharacterizedasPtfreecatalystforCEindye-sensitizedsolarcells（DSSCs）.ThemorphologyandstructureofLa2MoO6@MWCNTscompositesweredeterminedbyscanningelectronmicroscopy,transmissionelectronmicroscopeandX-raydiffraction.TheelectrochemicalperformanceofLa2MoO6@MWCNTscompositecatalystsforCEswasdeterminedbyphotocurrent-voltagemeasurements,cyclicvoltammetry,electrochemicalimpedancespectroscopy,andTafelpolarization.Thepowerconversionefficienciesof4.68%,4.87%and5.06%areobtainedforLa2MoO6:MWCNTswiththemassratiosof5:1,3:1and1:1towardsthereductionofI3-toI-underthesameconditions,respectively,whicharesuperiortothoseofMWCNTs（3,94%）andLa2MoO6（1.71%）electrodes.TheexperimentalresultsrevealthatthepresenceofMWCNTsresultsinanaugmentedactivecatalyticsurfaceareaandenhancedchargetransferfromCEtotheelectrolyte.

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