Core@shell bimetallic nanoparticle synthesis via anion coordination

Core@shell bimetallic nanoparticle synthesis via anion coordination

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時(shí)間:2019-08-04

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1、ARTICLESPUBLISHEDONLINE:24APRIL2011

2、DOI:10.1038/NCHEM.1030Core@shellbimetallicnanoparticlesynthesisviaanioncoordinationChristopherJ.Serpell1,JamesCookson2,DoganOzkaya2andPaulD.Beer1*Core@shellstructuredbimetallicnanoparticlesarecurrentlyofimmenseinterestduetotheiruniqueelectronic,opticalandcataly

3、ticproperties.However,theirsynthesisisnon-trivial.Wereportanewsupramolecularrouteforthesynthesisofcore@shellnanoparticles,basedonananioncoordinationprotocol—the?rsttofunctionbybindingtheshellmetaltothesurfaceofthepre-formedprimarymetalcorebeforereduction.Theresultantgold/palladiumandplatinum/pall

4、adiumcore@shellnanoparticleshavebeencharacterizedbyaberration-correctedscanningtransmissionelectronmicroscopy(aswellasothertechniques),givingstrikingatomic-resolutionimagesofthecore@shellarchitecture,andtheuniquecatalyticpropertiesofthestructurednanoparticleshavebeendemonstratedinaremarkableimpro

5、vementoftheselectiveproductionofindustriallyvaluablechloroanilinefromchloronitrobenzene.nmaximizingtheenormouspotentialbene?tsofnanotechnology,tants24,25,galvanicdisplacement26,27,controlledsimultaneousakeychallengeistocontrolthefabricationofwell-de?nedreduction28–31,andexploitationofthermodynami

6、ccore/shellpre-Inanoparticulatematerialsusingnovelinnovativemethods.Oneferencesthroughannealing20,32.Despitethiswork,todatethereisofthemostcommonroutesforstabilizingnanoparticlesisstillnogeneralmethodforthereliablesynthesisofcore@shellnano-throughtheadditionofligandsduringtheirpreparation.particl

7、esforanytwometals.Herein,wepresentanewproof-of-However,ingeneral,theligandsactmerelyasaprotectiveshieldconceptmethod,reportinganovelroutetocore@shellnanoparticlestopreventagglomerationtobulkmaterials.Suchligand-stabilizedthatusesligand-basedsupramolecularforcestoensuresurfaceseg-materialscanbecon

8、sideredtobecoagulationsofatomicandmol-regationoftheshellmetalontothepre-formedcorebeforeitsecularcomponents,theassemblyandstabilityofwhichrelyonreduction.Theprincipleisdemonstratedthroughthesynthesisofcooperativesupram

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