Ti-BDD涂层电极的制备与失效机理研究

Ti-BDD涂层电极的制备与失效机理研究Ti/BDD涂层电极的制备与失效机理研究

摘要：文中以钛(Ti)为基底，采用电化学沉积法在钛表面制备氮气等化物掺杂的晶粒尺寸为10-20nm的BDD薄膜，得到了BDD电化学失效的制备参数，发现电解液中的杂质、电流密度和溶液pH值等参数均会影响BDD膜的形成和性能。接着，通过扫描电子显微镜(SEM)、X射线衍射(XRD)、红外光谱(FTIR)、Raman光谱和暴露微区电化学实验等手段对制备的Ti/BDD涂层电极进行表征，分析了BDD薄膜的晶格结构、化学成分和电化学性能。研究结果表明：制备的Ti/BDD涂层电极具有优异的电化学性能，能稳定地实现高电位状态下的电化学反应，具有良好的抗腐蚀性、防污染性和耐磨性，尤其适用于电化学池中高卤化物存在的环境中作为阳极使用。

关键词：钛(Ti)；多晶金刚石(BDD)；涂层电极；电化学失效；失效机理；扫描电子显微镜(SEM)；X射线衍射(XRD)；红外光谱(FTIR)；Raman光谱；暴露微区电化学实验；高卤化物电化学反应；抗腐蚀性；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