中国科大学位与研究生教育
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主讲教师:ZHANG Wenjun 人气:5049 更新时间: 2017年12月12日
Abstract:Thestructuredesignofanelectrodeisoneofthemostimportantfactorsaffectingitsreactionkinetics,thecapabilityofmasstransportationwithelectrolyte,andconsequentlytheperformanceofanelectrochemicalenergystorageorconversionsystem.Asuccessfulapproachthathasbeenwidelydemonstratedistoconstructathree-dimensional(3D)nanoscale-structuredelectrode,whichenablesenhancedionandelectrontransport,increasedactivematerialloading,andimprovedmechanicalstability.Ascribingtotheircombinedsuperiorinherentpropertiesandthespecialstructureconfiguration,3Dgrapheneandtransitionmetaldichalcogenide(TMD)nanostructureshavedemonstratedpromisingapplicationsinelectrochemicalenergyconversionandstorage.Inthispresentation,Iwillreportourrecentprogressinapplying3Dgraphene,TMDandrelatedcompositesintheelectrochemicalelectrodeapplicationsderivedfromtheirdistinctmeritsofstructureandproperties,e.g.,supercapacitor,lithiumionbattery,vanadiumredoxflowbattery,andfuelcells.Biosketch:WenjunZhangobtainedhisDoctorofPhilosophydegreein1994fromLanzhouUniversity.HewasapostdocattheFraunhoferInstituteforSurfaceEngineeringandThinFilms(1995to1997)andattheCityUniversityofHongKong(1997to1998).From1998to2000,heworkedasaScienceandTechnologyAgencyFellowatNationalInstituteforResearchinInorganicMaterials.HejoinedCityUin2000againasaSeniorResearchFellow.HeiscurrentlyaProfessorinDepartmentofPhysicsandMaterialsScience;andheisalsothedeputyoftheCenterOfSuper-DiamondandAdvancedFilms(COSDAF).Hisresearchfocusesonthinfilms,semiconductingnanomaterials,surfacescienceandmodification,andions/materialsinteractions.
主讲教师:Efthimios Kaxiras 人气:2017 更新时间: 2017年11月22日
报告人简介:Dr.KaxirasreceivedaPhDintheoreticalcondensedmatterphysicsfromMITandjoinedthefacultyofHarvardUniversityin1991.HeistheFoundingDirectoroftheInstituteforAppliedComputationalScience,servedastheDirectoroftheInitiativeonInnovativeComputing,andhisdistinctionsincludeFellowoftheAmericanPhysicalSocietyandCharteredPhysicistoftheInstituteofPhysics.Hisresearchinterestsencompassawiderangeoftopicsinthephysicsofsolidsandfluids,mostrecentlyonmaterialsforrenewableenergy,especiallybatteriesandphotovoltaics,andonsimulationsofbloodflowincoronaryarteries.报告摘要:Thelastfewyearshavewitnessedasurgeofactivityinmachinelearningapproachesappliedtomaterialsscience.InthistalkIwilladdressboththepromiseandthelimitationsofusingdatascienceideastoexplorethepossibilitiesof“materialsbydesign”,drawingonexamplesfromrecentresearchinourgroup.Applicationsofourworkfocusonexploringthepropertiesofnewmaterialsforenergyrelatedproblems,includingimprovedbatteries,photovoltaics,andnewcatalysts;inaparallelbutdistincttypeofapproach,wehavebeenexploringhowmachinelearningapproachescanshedlightintofundamentalquestionslikethestrengthofamorphoussolids.
主讲教师:SonBinh T. Nguyen 人气:1512 更新时间: 2016年09月27日
Fromsingle-sitecatalystsandsuperamolecularassembliestometal-organicframeworks(MOFs)andporousorganicpllymer(POPs):Bridginghomogeneousandheterogeneouscatalysis
主讲教师:李涛 人气:1976 更新时间: 2016年09月27日
主讲教师:曾永平 人气:1501 更新时间: 2016年09月21日
主讲教师:孙守恒 人气:1999 更新时间: 2016年07月03日
Recentadvanceinsolutionphasesynthesishasmadeitpossibletoobtainnanoparticles(NPs)withtheirdimensionscontrolledatnear-atomicprecisionforcatalyticapplications.Inthistalk,Ihighlighttwoexamplesdemonstratedinourlabonthesynthesisandself-assemblyofCo-,andCu-basedNPsforenhancedelectrocatalyticreactions.MonodisperseCoNPsweresynthesizedviathermaldecompositionofcobaltcarbonylandassembledatwater-airinterfaceonaglasscarbon(GC)plateandtheircatalysisforoxygenevolutionreaction.TheseCoNPswerefurtherstabilizedagainstoxidationviareductiveannealingat600°C.Whenemployedasthecatalystforelectrochemicaloxidationreactionin0.1MKOH,themonolayerCoNPsshow15timeshigherturnoverfrequency(TOF)(2.13s-1)andmassactivity(1949A/g)thanthesameNPsdepositedonconventionalcarbonblackattheoverpotentialof0.4V.TheseCoNPsareapromisingnewclassofnoble-metal-freecatalystforwater-splitting.MonodisperseCuNPsassembledonpyridinic-Nrichgraphene(p-NG)showmuchenhancedcatalysisforselectiveelectrochemicalreductionofCO2toethylene(C2H4).At-0.9V(vsreversiblehydrogenelectrode),theC2H4formationFaradaicefficiencyandhydrocarbonselectivityreach19%and79%respectively.TheworkdemonstratesanewstrategytoimproveCuNPcatalyticactivityandselectivityforelectrochemicalreductionofCO2forsustainablechemistryandenergyapplications.
主讲教师:陈剑豪 人气:1333 更新时间: 2016年07月01日
Theproblemofunconventionalmagnetisminmaterialswithoutdandfelectronshasattractedcontinuousattention.Inparticular,alotofeffortshavebeendevotedtounderstandtheoriginandeffectsofmagneticmomentsinducedingraphenewithstructuredefectssuchasmissingcarbonatoms,absorptionoflightatomssuchashydrogenorfluorine.Wehavemeasuredthemagnetoresistance(MR)ofgrapheneatlowtemperaturewithin-situhydrogenationinultra-highvacuumenvironment.LargenegativeMRwasfoundinhydrogenatedgraphenewhichcouldbetunedbycarrierdensityandsampletemperature.Dependingonthedensityofabsorbedatomichydrogenandcarrierdensity,largelinearnegativeMRwasfoundwhichdidnotsaturateupto9Tesla.SuchnegativeMRcouldbethemanifestationoflocalmomentscreatedbyatomichydrogenabsorbedongraphene.
主讲教师:吴凯丰 人气:2466 更新时间: 2016年06月08日
olarenergyconversion,particularlysolar-drivenchemicalfuelformation,hasbeenintenselystudiedinthepastdecadeasapotentialapproachforrenewableenergygeneration.Efficientsolar-to-fuelconversionrequiresartificialphotosyntheticsystemswithstronglightabsorption,long-livedchargeseparationandefficientcatalysis.Colloidalquantumconfinednanoheterostructureshaveemergedaspromisingmaterialsforthisapplicationbecauseoftheabilitytotailortheirpropertiesthroughsize,shapeandcomposition.Inparticular,colloidalone-dimensional(1D)semiconductornanorods(NRs)offertheopportunitytosimultaneouslymaintainquantumconfinementinradialdimensionsfortunablelightabsorptionsandbulklikecarriertransportintheaxialdirectionforlong-distancechargeseparations.Inaddition,theversatilechemistryofcolloidalNRsenablestheformationofsemiconductorheterojunctionstoseparatephotogeneratedelectron-holepairsanddepositionofmetallicdomainstoacceptchargesandcatalyzeredoxreactions.Inthistalk,IreportourrecentresearchprogressoncolloidalNRheterostructuresandtheirapplicationsforsolarenergyconversion,emphasizingonmechanisticinsightsintotheworkingprincipleofthesesystems.Iwillintroducetheirelectronicstructuresanddynamicsofcarriertransportandinterfacialtransferobtainedfromtime-resolvedspectroscopicstudies.IwillalsodiscusshowthesecarrierdynamicsarecontrolledbytheirstructuresandprovidekeymechanisticunderstandingontheirlightdrivenH2generationperformances.
主讲教师:LIU Shubin 人气:1466 更新时间: 2016年06月08日
Inthistalk,wefirsthighlightissueswithorbitalrelatedtheoryinpredictingmolecularreactivity.Conceptualdensityfunctionaltheoryisthenintroducednext,whosestrengthandweaknessarebothshowcased.Themainpurposeofthistalkistointroducetotheaudienceanewrecentefforttoappreciateandentertainmolecularreactivityusingsimpledensityfunctionals,whichiscalledthedensityfunctionalreactivitytheory.Examplesarefollowed,includingquantifyingthestericeffectusingsimplekineticenergyfunctionals,providingaunifiedapproachtopredictelectrophilicity,nucleophilicityandregioselectivity,andproposingacompletelynewunderstandingaboutthenatureandoriginofortho/para/metagroupdirectingphenomenonforelectrophilicaromaticsubstitutionreactions.Futuredirectionsofpossibledevelopmentsofthistheoryarebrieflydiscussedattheend.
主讲教师:Yiying Wu 人气:1424 更新时间: 2016年06月08日
Here,IwillpresentoursystematicinvestigationofaK–O2batterythatusesK+ionstocapturesuperoxide(O2-)toformthethermodynamicallystableKO2product.Thisallowsforthebatterytooperatethroughthefacileone-electronredoxprocessofO2/O2-.Withouttheuseofcatalysts,thebatteryshowsalowdischarge/chargepotentialgapoflessthan50mVatamodestcurrentdensity.ThesimilarideahasalsobeenappliedtoNa-O2batteries.Iwillalsopresentourrecentprogressin“solarbattery”,whichpossessesthedualfunctionsofsolarenergyharvestingandstorageinasingledevice.Anexampleis\'lithium−iodinesolarflowbattery\'thatbringstogetheralithium–iodineredox-flowbatteryandadye-sensitizedphotoelectrode.Thephotoexcitedelectrontransferbetweenthephotoelectrodeandtheiodinecatholyteenablessolar-assistedchargingoftheflowbattery.Suchahybriddevicehaspromisingapplicationsinbuildingintegratedsolarharvesting/storage,solarfarmsandsolarfuellingstations.
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Aranda Pino
Profesor of Department of Algebra, Geometry and Topology Science Faculty, University of Málaga, Spain. Research Interests: Leavitt path
Nikos Hadjichristidis
Prof. Nikos Hadjichristidis, Department of Chemistry, University of Athens.
蔡荣根
中国科学院理论物理所研究员,博士生导师。中国引力和相对论天体物理学会副理事长(2008-) 中国科学技术大学交叉学科理论研究中心兼职教授
欧阳钟灿
欧阳钟灿,中国科学院院士。1968年清华大学自控系毕业,1981年清华大学物理系固体物理专业获硕士学位,1984年获光学专业理学博士学位。1985-1986年在理论物理所
Manuela M. Veloso
Manuela M. Veloso教授是国际人工智能和自主机器人领域的主要学界领导人和学术带头人之一,取得了一系列杰出成就,其中部分成果产生了深远的影响。
庄小威
庄小威,华裔美籍生物物理学家,美国国家科学院院士, 哈佛大学化学与化学生物、物理学教授,创办有庄小威实验室。
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