简介：Theeffectofbismuth（Bi）forbothVO2+/VO2+andV3+/V2+redoxcouplesinvanadiumflowbatteries（VFBs）hasbeeninvestigatedbydirectlyintroducingBionthesurfaceofcarbonfelt（CF）.TheresultsshowthatBihasnocatalyticeffectforVO2+/VO2+redoxcouple.Duringthefirstchargeprocess,BiisoxidizedtoBi3+（neverreturnbacktoBimetalinthesubsequentcycles）duetothelowstandardredoxpotentialof0.308V（vs.SHE）forBi3+/BiredoxcouplecomparedwithVO2+/VO2+redoxcoupleandBi3+exhibitno（orneglectable）electro-catalyticactivity.Additionally,therelationshipbetweenBiloadingandelectrochemicalactivityforV3+/V2+redoxcouplewasstudiedindetail.2wt%Bi-modifiedcarbonfelt（2%-BiCF）exhibitsthehighestelectrochemicalactivity.Usingitasnegativeelectrode,ahighenergyefficiency（EE）of79.0%canbeachievedatahighcurrentdensityof160mA/cm2,whichis5.5%higherthanthepristineone.Moreover,theelectrolyteutilizationratioisalsoincreasedbymorethan30%.Eventhecelloperatedat140mA/cm2forover300cycles,theEEcanreach80.9%withoutobviousfluctuationandattenuation,suggestingexcellentcatalyticactivityandelectrochemicalstabilityinVFBs.

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简介：IncorporationofstrontiumintoV-Moalumina-supportedcatalystenhanceditsperformance(increasedconversionandselectivity,decreasedreducibilityandimprovedstability)inpropaneoxydehydrogenationtopropylene.12.5%SrloadingwasshowntobetheoptimumcontenttotheV-Mocatalyst.Theresultsweresupportedbyvariouscharacterizationtechniques,namely,BET,XRD,SEM,FTIRandTPD.

简介：Theelectronicstructures,dielectricfunctions,complexrefractiveindicesandabsorptionspectraforaperfectPbW04(PWO)crystalandthePWOcrystalscontainingleadvacancyV^2-pbhavebeencalculatedusingafull-potential(linearized)augmentedplane-wave(LAPW)+localorbitals(LO)methodwiththelatticestructureoptimized.Thepeaksoftheabsorptionspectracorrespondingtotheelectronictransitionshavebeenstudied.

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简介：因为graphene和phosphorene，二维(2D)组IV和组V元素的分层的材料引起大兴趣。然而，组IVV单层没收到到期的注意。在这个工作，啜单层的三种类型计算地被设计探索他们的电子结构和光性质。计算证实这些单层的稳定性，它都是有在范围的bandgaps的indirect-bandgap半导体1.382.21eV。bandgaps在pH=跨骑水的氧化还原作用潜力0，用作watersplitting光催化剂显示单层的潜力。计算光性质证明啜2D材料的某些单层是可见的光的吸收器并且将用作optoelectronic设备的好候选人。

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简介：QuantumdynamicscalculationsforthetitlereactionH(2S)+S2(X3-Σg)→SH(X2Π)+S(3P)areperformedbyusingagloballyaccuratedoublemany-bodyexpansionpotentialenergysurface[J.Phys.Chem.A1155274(2011)].TheChebyshevrealwavepacketpropagationmethodisemployedtoobtainthedynamicalinformation,suchasreactionprobability,initialstate-specifiedintegralcrosssection,andthermalrateconstant.Itisfoundnotonlythatthereisareactionthresholdnear0.7eVinbothreactionprobabilitiesandintegralcrosssectioncurves,butalsothatboththeprobabilityandcrosssectionincreasefirstlyandthendecreaseasthecollisionenergyincreases.Theexistenceoftheresonancestructureinboththeprobabilityandcrosssectioncurvesisascribedtothedeeppotentialwell.Thecalculationoftherateconstantrevealsthatthereactionoccurringonthepotentialenergysurfaceoftheground-stateHS2isslowtotakeplace.

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简介：在一篇最近的文章[物理信A372(2008)417]，王等。建议了一个方法，它被叫(G'/G)扩大方法，寻找非线性的进化方程的旅行波浪答案。包含KdV方程，mKdV方程，变体Boussinesq方程，和Hirota一种奶油色的陶器方程的参数的旅行波浪解决方案被使用这个方法获得。他们想(G'/G)扩大方法是一个新方法和许多非线性的进化方程的更多的旅行波浪答案能被获得。在这篇论文，我们将证明(G'/G)扩大方法等价于扩大tanh功能方法。

简介：Ｒｏｔａｔｉｏｎ　ｉｎ　Ｒｅａｃｔｉｏｎ　１９Ｆ＋５１ＶＲｏｔａｔｉｏｎｉｎＲｅａｃｔｉｏｎ１９Ｆ＋５１Ｖ￥ＷａｎｇＱｉ；ＬｕＪｕｎ；ＸｕＨｕｓｈａｎ；ＬｉＳｏｎｇｌｉｎ；ＺｈｕＹｏｎｇｔａｉａｎｄＺｈａｎｇＹｕｈｕＩｎｄＬｓｓｉ...

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简介：金属V作为贮氢材料具有良好的增压性能因而在ICF靶丸制备工艺中备受关注，但是金属V难活化，严重影响了其在增压材料方面的应用。为了改善金属V的活化性能，向金属V中掺杂少量的金属Ni以期达到对其改性和改善其贮氢性能的目的。