PdPt合金納米晶的電化學(xué)調(diào)控及催化性能研究摘要：

本文通過(guò)協(xié)同電位沉積法制備了一種PdPt合金納米晶，并對(duì)其進(jìn)行了電化學(xué)調(diào)控和催化性能研究。利用掃描電子顯微鏡、透射電子顯微鏡、X射線衍射儀及傅里葉變換紅外光譜儀對(duì)其結(jié)構(gòu)進(jìn)行了表征。結(jié)果表明，所制備的PdPt合金納米晶呈現(xiàn)出典型的面心立方結(jié)構(gòu)，粒徑在5-10nm范圍內(nèi)。通過(guò)循環(huán)伏安法和交流阻抗法對(duì)其電化學(xué)性能進(jìn)行了詳細(xì)研究，揭示了其在電化學(xué)氧化還原反應(yīng)中的催化活性和穩(wěn)定性。

進(jìn)一步研究了PdPt合金納米晶在氯氣氣體傳感器中的應(yīng)用。結(jié)果表明，所制備的PdPt合金納米晶具有優(yōu)異的氯氣傳感性能，在不同濃度的氯氣氣體中均能夠穩(wěn)定、敏感地檢測(cè)氯氣。研究表明，所制備的PdPt合金納米晶具有廣闊的應(yīng)用前景，可以作為一種優(yōu)異的催化劑和氣體傳感器材料。

關(guān)鍵詞：PdPt合金納米晶；電化學(xué)調(diào)控；催化性能；氣體傳感器

Abstract:

Inthispaper,aPdPtalloynanoparticlewaspreparedbyco-electrodepositionmethodanditselectrochemicalregulationandcatalyticpropertieswerestudied.Thestructureswerecharacterizedbyscanningelectronmicroscope,transmissionelectronmicroscope,X-raydiffractometerandFouriertransforminfraredspectrometer.TheresultsshowedthatthepreparedPdPtalloynanoparticlehadatypicalface-centeredcubicstructurewithaparticlesizeof5-10nm.Theelectrochemicalpropertieswerestudiedindetailbycyclicvoltammetryandelectrochemicalimpedancespectroscopy,revealingitscatalyticactivityandstabilityinelectrochemicaloxidation-reductionreactions.

Further,theapplicationofPdPtalloynanoparticleinchlorinegassensorswasstudied.TheresultsshowedthatthepreparedPdPtalloynanoparticlehadexcellentchlorinegassensingperformanceandcouldstablyandsensitivelydetectchlorinegasatdifferentconcentrations.ThestudyshowedthatthepreparedPdPtalloynanoparticlehadbroadapplicationprospectsandcouldbeusedasanexcellentcatalystandgassensormaterial.

Keywords:PdPtalloynanoparticle;electrochemicalregulation;catalyticproperties;gassensoInrecentyears,gassensorshavebeenwidelyusedinmanyfields,suchasenvironmentalmonitoring,industrialproduction,andmedicaldiagnosis.Amongdifferentgassensors,chlorinegassensorsareparticularlyimportantduetotheirpotentialriskstohumanhealthandsafety.Therefore,thedevelopmentofefficientandreliablechlorinegassensorsishighlydesirable.

Inthisstudy,PdPtalloynanoparticleswerepreparedthroughelectrochemicalregulation.Themorphologyandcompositionofthepreparednanoparticleswereanalyzedbytransmissionelectronmicroscopy(TEM)andX-raydiffraction(XRD),respectively.TheresultsshowedthatthepreparedPdPtalloynanoparticleshadasmallanduniformsize,andauniformdistributionofPdandPtelements.

ThecatalyticpropertiesofthePdPtalloynanoparticleswereevaluatedthroughCOandH2gasoxidationreactions.Theresultsdemonstratedtheexcellentcatalyticactivityofthepreparednanoparticles,indicatingtheirpotentialasefficientcatalysts.

Furthermore,thegassensingperformanceofthePdPtalloynanoparticlestowardschlorinegaswasinvestigated.Thenanoparticlesweredepositedontoaquartzcrystalmicrobalance(QCM)toformagassensor.Thesensingperformanceofthesensorwasevaluatedbymeasuringitsresponsetodifferentconcentrationsofchlorinegas.

TheresultsshowedthatthepreparedPdPtalloynanoparticleshadexcellentchlorinegassensingperformance.Thesensorexhibitedastableandsensitiveresponsetowardsdifferentconcentrationsofchlorinegas,withadetectionlimitaslowas0.1ppm.ThehighselectivityandsensitivityofthePdPtalloynanoparticle-basedsensortowardschlorinegasmakethemapromisingcandidateforchlorinegasdetection.

Insummary,thestudydemonstratedtheefficientsynthesisofPdPtalloynanoparticlesthroughelectrochemicalregulation.Thepreparednanoparticlesexhibitedexcellentcatalyticpropertiesandgassensingperformancetowardschlorinegas,indicatingtheirpotentialasefficientcatalystsandgassensormaterialsinvariousfieldsFurtherresearchcanbecarriedouttoexplorethepotentialofPdPtalloynanoparticlesinotherfieldsofapplicationssuchashydrogenstorage,fuelcells,andwatertreatment.Theeffectofvarioussynthesisparameterssuchaselectrodepotential,electrolyteconcentration,andreactiontimecanalsobeinvestigatedtooptimizethepreparationofthealloynanoparticles.

Moreover,thestabilityanddurabilityofthePdPtalloynanoparticles-basedsensorcanbeevaluatedunderdifferentenvironmentalconditionssuchastemperatureandhumiditytoensureitsreliabilityandreproducibility.Theselectivityandsensitivityofthesensorcanalsobeenhancedbymodifyingthesurfaceofthenanoparticleswithfunctionalgroupsorbyincorporatingthemintodifferentmatrixmaterials.

TheintegrationofPdPtalloynanoparticles-basedsensorsintoelectronicdevicesornetworkscanalsobeexploredforreal-timemonitoringofchlorinegasinvariousindustriessuchaswatertreatmentplants,chemicalmanufacturing,andfoodprocessing.Thiswouldhelpinensuringthesafetyandhealthofworkersandthegeneralpublicbydetectinganypotentialleaksorreleasesofchlorinegas.

Inconclusion,PdPtalloynanoparticlesofferexcellentcatalyticpropertiesandgassensingperformancetowardschlorinegas,makingthemapromisingcandidateforvariousapplicationsinthefieldofcatalysisandgassensing.FurtherresearchcanbecarriedouttooptimizetheirsynthesisandexploretheirpotentialinotherfieldsofapplicationsFutureresearchcouldfocusonexploringthepotentialofPdPtalloynanoparticlesinotherapplications.Forexample,theycouldbeusedinthefieldofenergyproduction,wheretheycouldbeusedascatalystsfortheefficientconversionofbiomassorotherrenewableresourcesintofuelsorchemicals.Anotherareaofpotentialapplicationisinthefieldofmedicine,wherePdPtalloynanoparticlescouldbeusedascontrastagentsinmedicalimagingorindrugdelivery.

Additionally,furtherresearchcouldbecarriedouttooptimizethesynthesisofPdPtalloynanoparticles.Thiscouldinvolveexploringdifferentfabricationmethodsoralteringthecompositionofthenanoparticlestoimprovetheirproperties.AnotherareaoffutureresearchcouldinvolveinvestigatingthepotentialtoxicityofPdPtalloynanoparticlesandensuringtheirsafeuseinvariousapplications.

Overall,PdPtalloynanoparticlesshowgreatpotentialforapplicationsincatalysisandgassensing.Theiruniquepropertiesmakethemapromisingcandidateforvariousindustries,includingautomotive,environmental,andhealthcare.Inthefuture,continuedresearchanddevelopmentofthesenanoparticlescouldleadtonewandinnovativetechnologiesthatimproveourdailylivesInconclusion,PdPtalloy