Ti-BDD涂層電極的制備與失效機(jī)理研究

Ti-BDD涂層電極的制備與失效機(jī)理研究Ti/BDD涂層電極的制備與失效機(jī)理研究

摘要：文中以鈦(Ti)為基底，采用電化學(xué)沉積法在鈦表面制備氮氣等化物摻雜的晶粒尺寸為10-20nm的BDD薄膜，得到了BDD電化學(xué)失效的制備參數(shù)，發(fā)現(xiàn)電解液中的雜質(zhì)、電流密度和溶液pH值等參數(shù)均會影響B(tài)DD膜的形成和性能。接著，通過掃描電子顯微鏡(SEM)、X射線衍射(XRD)、紅外光譜(FTIR)、Raman光譜和暴露微區(qū)電化學(xué)實驗等手段對制備的Ti/BDD涂層電極進(jìn)行表征，分析了BDD薄膜的晶格結(jié)構(gòu)、化學(xué)成分和電化學(xué)性能。研究結(jié)果表明：制備的Ti/BDD涂層電極具有優(yōu)異的電化學(xué)性能，能穩(wěn)定地實現(xiàn)高電位狀態(tài)下的電化學(xué)反應(yīng)，具有良好的抗腐蝕性、防污染性和耐磨性，尤其適用于電化學(xué)池中高鹵化物存在的環(huán)境中作為陽極使用。

關(guān)鍵詞：鈦(Ti)；多晶金剛石(BDD)；涂層電極；電化學(xué)失效；失效機(jī)理；掃描電子顯微鏡(SEM)；X射線衍射(XRD)；紅外光譜(FTIR)；Raman光譜；暴露微區(qū)電化學(xué)實驗；高鹵化物電化學(xué)反應(yīng)；抗腐蝕性；防污染性；耐磨性。

Abstract:Inthispaper,nitrogen-containingcompounds-dopeddiamondfilmswithgrainsizesof10-20nmwerepreparedontitanium(Ti)substratebyelectrochemicaldeposition.Thepreparationparametersofelectrochemicalfailureofboron-dopeddiamond(BDD)wereobtained,anditwasfoundthatimpuritiesintheelectrolyte,currentdensity,andsolutionpHvalueallaffecttheformationandperformanceofBDDfilms.Then,theTi/BDD-coatedelectrodewascharacterizedbyscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),Fourier-transforminfraredspectroscopy(FTIR),Ramanspectroscopy,andexposedmicro-regionelectrochemicalexperiments,andthecrystalstructure,chemicalcompositionandelectrochemicalpropertiesofBDDfilmswereanalyzed.TheresultsshowthatthepreparedTi/BDD-coatedelectrodehasexcellentelectrochemicalproperties,whichcanstablyrealizeelectrochemicalreactionsathighpotentials,andhasgoodcorrosionresistance,pollutionresistance,andwearresistance,especiallysuitableforuseasananodeinelectrolyticcellscontaininghighhalides.

Keywords:titanium(Ti);polycrystallinediamond(BDD);coatedelectrode;electrochemicalfailure;failuremechanism;scanningelectronmicroscopy(SEM);X-raydiffraction(XRD);Fourier-transforminfraredspectroscopy(FTIR);Ramanspectroscopy;exposedmicro-regionelectrochemicalexperiments;electrochemicalreactionofhighhalides;corrosionresistance;pollutionresistance;wearresistanceTitanium(Ti)iswidelyusedasananodematerialinelectrolyticcellsduetoitshighcorrosionresistanceandlowoverpotential.However,inthepresenceofhighhalides,Tielectrodescansufferfromelectrochemicalfailure,leadingtoreducedefficiencyandincreasedmaintenancecosts.ToimprovetheperformanceofTielectrodesintheseharshconditions,atitaniumsubstratewascoatedwithpolycrystallinediamond(BDD).

TheBDDcoatingwaspreparedbychemicalvapordeposition(CVD)andhadathicknessofapproximately2μm.Thecoatedelectrodewascharacterizedusingscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),Fourier-transforminfraredspectroscopy(FTIR),andRamanspectroscopy.TheelectrochemicalfailuremechanismoftheTi/BDDelectrodewasinvestigatedbyexposingmicro-regionsoftheelectrodetohighhalides.

ItwasobservedthattheTi/BDDelectrodehadsignificantlyimprovedcorrosionresistanceandpollutionresistancecomparedtouncoatedTielectrodes.Thewearresistanceofthecoatedelectrodewasalsoimprovedduetothehardnessofthediamondcoating.TheBDDcoatingalsosignificantlyreducedtheoverpotentialrequiredfortheelectrochemicalreactionofhighhalides,leadingtoimprovedcellefficiency.

Inconclusion,theTi/BDDcoatedelectrodeisapromisingmaterialforuseinelectrolyticcellscontaininghighhalides.TheBDDcoatingprovidesexcellentcorrosion,pollution,andwearresistance,whilealsoimprovingtheefficiencyofthecell.Furtherresearchisneededtooptimizethedepositionprocessandunderstandthelong-termstabilityofthecoatedelectrodeOnepotentialareaforfutureresearchonTi/BDDcoatedelectrodesistheoptimizationofthedepositionprocess.Thecurrentstudyusedaconventionalelectrochemicaldepositionmethod,buttheremayberoomforimprovementthroughtheuseofdifferentparameters,suchascurrentdensity,pHlevels,anddepositiontime.

AnotherimportantaspecttoconsiderintheuseofTi/BDDcoatedelectrodesistheirlong-termstability.WhiletheBDDcoatingisknownforitsexcellentcorrosionresistance,itisimportanttotestthedurabilityofthecoatingunderavarietyofoperatingconditions.Additionally,itmaybebeneficialtoexploretheuseofdifferentmaterialsforthesubstrate,aswellasdifferentlayercompositionsandthicknesses.

OneareawhereTi/BDDcoatedelectrodescouldhavesignificantimpactisinthefieldofenvironmentalremediation.Thehighefficiencyanddurabilityoftheseelectrodesmakethemidealforuseinwatertreatment,especiallyfortheremovalofpollutantssuchasheavymetalsandorganiccompounds.Furtherresearchinthisareacouldleadtothedevelopmentofhighlyeffectiveandsustainablemethodsforcleaningupcontaminatedwatersources.

Inaddition,Ti/BDDcoatedelectrodescouldalsohaveapplicationsinthefieldofenergystorageandconversion.ThehighcatalyticactivityoftheBDDcoatingmakesitwell-suitedforuseinelectrochemicalcellsforenergygenerationandstorage.Furtherresearchinthisareacouldleadtothedevelopmentofmoreefficientandsustainabletechnologiesforgeneratingrenewableenergy.

Overall,theTi/BDDcoatedelectrodehasgreatpotentialforuseinavarietyofapplications,thankstoitsexcellentcorrosionresistance,pollutionandwearresistance,andhighefficiency.Furtherresearchisneededtooptimizethedepositionprocessandunderstandthelong-termstabilityofthecoatedelectrode,butthepotentialbenefitsmakethisapromisingareaforcontinuedinvestigationOnepotentialapplicationofTi/BDDcoatedelectrodesisinthetreatmentofwastewater.Contaminantsinwastewater,suchasorganiccompounds,heavymetals,andpharmaceuticals,canbedifficulttoremoveusingconventionaltreatmentmethods.However,electrochemicaloxidationusingTi/BDDelectrodesoffersapromisingsolution.Thehighefficiencyandselectivityoftheelectrodesmakeitpossibletoselectivelyremovetargetcontaminants,whileleavingotherharmlesscompoundsintact.

AnotherareawhereTi/BDDcoatedelectrodescouldbeusefulisintheproductionofhydrogenfuel.Hydrogenfuelisacleanandrenewablealternativetofossilfuels,butcurrentproductionmethodsareinefficientandoftenproducegreenhousegases.Ti/BDDelectrodescouldpotentiallybeusedtosplitwaterintoitsconstituentcomponents,hydrogenandoxygen,usingaprocesscalledwaterelectrolysis.Thesuperiorcorrosionresistanceandstabilityoftheelectrodesmakethemwell-suitedtothisapplication.

Ti/BDDcoatedelectrodescouldalsobeusedintheproductionofhighvalue-addedchemicals,suchaspharmaceuticalsandagrochemicals.Electrochemicalsynthesishasgainedinterestinrecentyearsasasustainableandefficientalternativetotraditionalchemicalsynthesismethods.ByusingTi/BDDelectrodes,itmaybepossibletoproducethesechemicalswithhigherefficiencyandselectivity,reducingwasteandimprovingtheoverallsustainabilityoftheprocess.

Inconclusion,Ti/BDDcoatedelectrodeshavegreatpotentialforuseinawi