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ID:54369944
大小:2.76 MB
页数:7页
时间:2020-04-30
《Al/Pb-Ag阳极在锌电积过程中的阳极行为和微观结构.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、TransactionsofNonfc}rrousMetals黉Av·ailable:o,nSlinecaitewnwwc.secieDnceidrierect.ctomSocietyofChinaPressTrans.NonferrousMet.Soc.China24(2014)893-899www.tnmsc.crlAnodicbehaviorandmicrostructureofA1/Pb—AganodeduringzincelectrowinningYong—chunZHANG,Bu—r
2、uingCHEN,Hai.taoYANG,Zhong—chengGUO,,Rui.dongXU1.FacultyofMetallurgyandEnergyEngineering,KunmingUniversit),ofScienceandTechnology,Kunming650093,China;2.KunmingHenderaofScienceandTechnologyCo.Ltd,Kunming650106,ChinaReceived6March2013;accepted5November
3、2013Abstract:AnodicbehaviorsandoxygenevolutionkineticsofPb—O.8%AgandA1/Pb-0.8%Aganodesduringtheinitial24hzincelectrowinningwereinvestigatedwithcyclicvoltammetry(Cv)curvesandelectrochemicalimpedancespectroscopy(EIS).Theresultsrevealthattheanodiebehavi
4、orsandreactionkineticsofthetwoano~svaryalotduringtheanodicpolarizationwhichindicatetheformationandstabilizationofanodiclayer.ComparedwithconventionalPb-0.8%Aganode.Al门Pb-0.8%Aganodehaslongertimeofanodicpolarization.Attheverybeginningofanodicpolarizat
5、ion,thetwoanodesallexhibithigherpotentialofoxygenevolutionreaction(OER)sincethereactioniscontrolledbythetransformationstepofintermediates.Then,its0ERpotentialislargelydiminishedandOERrateisdeducedfromtheformationandadsorptionofthefirstintermediatefS—
6、OHaas).Intheprolongedanodicpolarization。theanodicpotentialofAl/Pb—O.8%AggraduallydecreasesandthefinalvalueismorestablethanthatofconventionalPb-0.8%Aganode.Ontheanodiclayerafter24hofanodicpolarization.the0ERpotentialiscontrolledbytheformationandadsorp
7、tionofintermediate.ThemicrostructuresofAvP_o.8%AgandPl卜O.8%Aganodesafter24hofanodicpolarizationwereanalyzedbyscanningelectronmicroscope(SEM1.Keywords:zincelectrowinning;oxygenevolutionkinetics;electrochemicalimpedancespectroscopy;oxygenevolutionreact
8、ionpotentialanodes,showingthatpropertiesofconventionalPb_Ag1IntroductionanodesdependontheirAgcontent.Theshapeofanodesalsocaninfluencetheirproperties.Forinstance,Thedemandforenergy—savingandhigherstandardcomparedwithconventionalPb-Aganodes.porousofcat
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