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催化学报 2008
量子电动学诱导电磁辐射研究纳米催化剂, PP. 1073-1078 Keywords: nanocatalyst,nanoparticle,gold,quantumelectrodynamics Abstract: ？Goldhasbeenregardedasapoorheterogeneouscatalystbecauseitisgenerallyconsideredanonreactivemetal.Butasnanocatalysts,goldandothermetalssomehowsignificantlyenhancereactivity.Itisgenerallythoughtchemicalbondsofreactantsareweakenedbyadsorptiontonanocatalyststherebyallowingreactionstoproceedmorerapidly,buthowthisreactionproceedstocompletionisnotwellunderstood.Heregoldnanocatalystsaretreatedasunsupportednanoparticles(NPs)inasolutionofreactantmoleculesfromwhichextensionsaremadetogoldNPssupportedontitaniumdioxide.WhethertheNPsaresupportedorunsupported,enhancedcatalyticreactivitydependsonabsorbedthermalkT(kisBoltzmann′sconstantandTisabsolutetemperature)energyaccumulatedfrompriorcollisionsofreactantmolecules.TheaccumulatedkTenergyistreatedaselectromagnetictherebyallowingfrequencyup-conversionbyquantumelectrodynamics(QED)totheconfinementfrequencyoftheNP,typicallybeyondthevacuumultraviolet(VUV).Bythistheory,thechemicalreactionofreactantmoleculeshavingbondsweakenedbyadsorptioniscompletedbyQEDinducedVUVphotolysis.
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