Recent research development in molten salt electrochemistry at the Electrochemical Research Centre of Wuhan University is briefly reviewed. Attention is first paid on the preparation of silicon and its binary alloys, as well as oxide based functional materials. In addition, the quartz sealed Ag/AgCl reference electrodes suitable for high temperature molten salts are described. Focus is also given to two types of metal based cavity electrodes that are capable of loading micrograms of oxide powders and hence allow fast and reproducible measurements for the electrochemical behaviour of the powders in molten salts. The article finishes by highlighting the concept of “three-phase interline electrochemistry” in conjunction with reporting the preliminary results from the investigation of a simple "thin layer model" for the electrochemical reduction of solid AgCl in aqueous solution and solid SiO_(2)in molten salts.
QiuGuohong,MaMeng,WangDihua,etal.MetalliccavityelectrodesforInvestigationofredoxActivepowdersinmolten salts[J].J.Electrochem.Soc.,(submitted).
DengYuan,WangDihua,XiaoWei,etal.Electrochemistryatconductor/insulator/electrolytethree phaseInterlines:a thinlayermodel[J].J.Phys.Chem.B.,(submitted).
[1] ChaChuansin(查全性),LuJuntao(陆君涛).Study oftheelectrochemistryofsystemsofpracticalimportance[J].Electrochemisty(inChinese),1995,1(2):115.
[2] FrayDJ,FarthingTW,ChenGZ.Removalofoxygen frommetaloxidesandsolidsolutionsbyelectrolysisina fusedsalt[P].1WOPat:9964638,1999.
[3] ChenGZ,FrayDJ,FarthingTW.Directreductionof TiO2inmoltencalciumdichloride[J].Nature,2000,407:361.
[4] FlowerHM.Amovingoxygenstory[J].Nature,2000,407:305.
[5] McGowanP.Returntozero[J].ChemistryinBritain.2001.37(2):21.
[6] DrChenandthephilosopher'sstone[J].TheEcono mist,2000,Sept:150.
[7] FreemantleMichael.Titaniumextracteddirectlyfrom TiO2[J].C&ENews,2000,25(Sept):12.
[8] HillS.Gettough[J].NewScientist,2001,170(2297):47.
[9] RodriguezP,MohandasKS.Aparadigmshiftinthee lectrowinningofmetals[J].CurrentScience,2001,81(5):443.
[10] FallerK,FroesFH.Theuseoftitaniuminfamilyau tomobiles:currenttrends[J].JournaloftheMinerals Metals&MaterialsSociety,2001,53(4):27.
[11] SchauerteO.Titaniuminautomotiveproduction[J].AdvancedEngineeringMaterials,2003,5(6):411.
[12] FlowerHM,SoutisC.Materialsforairframes[J].AeronauticalJournal,2003,107(1072):331.
[13] MartinJL.Low costtitaniumprocessdevelopment[DB/CD].address1013.pdf,20031024.
[14] ChenGZ,FrayDJ.Novelcathodicprocessesinmol tensalts[A].Proceedingsof6thInternationalSympo siumonMoltenSaltChemistryandTechnology,eds.ChenNianyi,QiaoZhiyu[C].Shanghai:ShanghaiU niversityPress,2001:79.
[15] ChenGZ,FrayDJ.Voltammetricstudiesoftheoxy gen titaniumbinarysysteminmoltencalciumchloride[J].JournaloftheElectrochemistrySociety,2002,149(11):E455～E467.
[16] OnoK,SuzukiRO.AnewconceptforproducingTi sponge:Calciothermicreduction[J].JOM Journalof theMineralsMetalsandMaterialsSociety,2002,54(2):59～61.
[17] SuzukiRO,TeranumaK,OnoK.Calciothermicre ductionoftitaniumoxideandin situelectrolysisin moltenCaCl2[J].MetallurgicalandMaterialsTrans actionsB ProcessMetallurgyandMaterialsProcessing Science,2003.34(3):287.
[18] DringK,JacksonM,DashwoodR,etal.Electro chemicalDeoxidationMechanismsofTitaniumOxides[A].inCost AffordableTitaniumSymposiuminHon orofProfessorHarveyFlower,EditedbyF.H.Froes,M.AshrafImam,andDerekFray.P95.TMS(The Minerals,Metals&MaterialsSociety)[C].North Carolina,March14～18,2004.
[19] YanXY,FrayDJ.Productionofniobiumpowderby directelectrochemicalreductionofsolidNb2O5ina eutecticCaCl2NaClmelt[J].MetallurgicalandMa terialsTransactionsB ProcessMetallurgyandMaterials ProcessingScience,2002,33(5):685.
[20] NohiraT,YasudaK,ItoY.Pinpointandbulkelectro chemicalreductionofinsulatingsilicondioxidetosili con[J].NatureMaterials,2003,2(6):397.
[21] YanXY,FrayDJ.Usingelectro deoxidationtosyn thesizeniobiumspongefromsolidNb2O5inalkali al kaline earthmetalchloridemelts[J].JournalofMa terialsResearch,2003,18(2):346.
[22] ChenGZ,GordoE,FrayDJ.Directelectrolytic preparationofchromiumpowder[J].Metallurgical andMaterialsTransactionsB ProcessMetallurgyand MaterialsProcessingScience,2004,35(2):223.
[23] GordoE,ChenGZ,FrayDJ.Towardoptimisationof electrolyticreductionofsolidchromiumoxidetochro miumpowderinmoltenchloridesalts[J].Electro chimicaActa,2004,49(13):2195.
[24] FennAJ,CooleyG,FrayD,etal.ExploitingFFC cambridgeprocess[J].AdvancedMaterials&Proces ses,2004,162:51.
[25] GlowackiBA,YanXY,FrayDJ,etal.Niobium basedintermetallicsasasourceofhigh current/high magneticfieldsuperconductors[J].PhysicaC,2002,372～376:1315.
[26] MaMeng,WangDihua,HuXiaohong,etal.Pre pareationoftitaniumalloysbyelectrochemicalreduc tionofsolidoxides[A].12thProceedingofChinese ElectrochemistrySociety[C].Shanghai:2003.H13.
[27] JinXianbo,GaoPei,WangDihua,etal.Electrochemicalpreparationofsiliconanditsalloysfromsolid oxidesinmoltencalciumchloride[J].Angew.Chem.Int.Edit.,2004,43:733.
[28] Greenerroutetopuresilicon[J].C&ENews,9Feb.2004,24.
[29] Electrochemicalextractionofsilicon:newapproachfor amoreenvironmentallyfriendlylarge scaleprocess[DB].http://www.chemie.de/news/e/34607/?sort=3,30,January,2004.
[30] BradleyDavid,Greensiliconproduction[DB/CD].ElementalDiscoveries Septermber2004,Issue73,ht tp://www.sciencebase.com/sept04iss.html.
[31] JiangKai,HuXiaohong,WangDihua,etal.Prepara tionandpropertiesstudyofsub titaniumoxidebyelec tro reductionofTiO2inmotenCaCl2[A].12thPro ceedingofChineseElectrochemistrySociety[C].Shanghai:2003.G11.
[32] JiangKai,HuXiaohong,SunHuijiao,etal.Electro chemicalsynthesisofLiTiO2andLiTi2O4inmolten LiCl[J].Chem.Mater.,2004,16:4324.
[33] GaoPei(高佩),JinXianbo(金先波),WangDihua(汪的华),etal.Preparationofanovelreferencee lectrodeinmoltenelectrode[J].Electrochemistry(in Chinese),2005,11(1):8.
[34] GaoPei,JinXianbo,WangDihua,HuXiaohong,ChenGeorgeZ.,AQuartzSealedAg/AgclReference ElectrodeforCaCl2BasedMoltenSalts[J],J.Elec troanal.Chem.,2005,4.
[35] ChaChuansin,LiChangming,YangHanxi,etal.Powdermicroelectrode[J].J.Electroanal.Chem.,1994,368:47.
