Abstract
A metallic cavity electrode is used for further investigation of the electrochemical behaviour of(Cr_(2)O_3) powder in molten CaCl_(2)(Na: ~0.02% by mass,Mg: < 0.005% by mass) at 900 ℃.The Cr_(2)O_(3) powder reduction mechanism was confirmed in line with EDX and SEM analysis of the potentiostatic electrolysis products.The correlations between the particle size of metallised product and the electrolysis potential,or electrolysis time were analysed.
Keywords
Metallic cavity electrode, Direct electrochemical reduction, Chromium oxide powder, Cyclic voltammetry, Chronoamperometry, Molten salt
Publication Date
2006-08-28
Online Available Date
2006-08-28
Revised Date
2006-08-28
Received Date
2006-08-28
Recommended Citation
Guo-hong QIU, Di-hua WANG, Xian-bo JIN, Xiao-hong HU, Zheng CHEN.
Investigation of the Direct Electrochemical Reduction of Cr_(2)O_(3) Powder in Molten CaCl_(2) by a Metallic Cavity Electrode[J]. Journal of Electrochemistry,
2006
,
12(3): 304-309.
DOI: 10.61558/2993-074X.1742
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol12/iss3/14
References
[1]Chen G Z,Fray D J,Farth ing T W.D irect electro-chem ical reduction of titan ium d ioxide to titan ium inmolten calc ium chloride[J].Nature,2000,407:361~364.
[2]W ang D ihua(汪的华),Chen Zheng(陈政).Innova-tion in molten salt electrochem istry[J].E lectrochem is-try(in Ch inese),2005,11(2):119~124.
[3]Yan X Y,Fray D J.E lectrochem ical stud ies on reduc-tion of solid Nb2O5in molten CaC l2-NaC l eutectic[J].J.E lectrochem.Soc.,2005,152(1):D12~D21.
[4]Chen G.Z,Gordo E,Fray D J.D irect electrolyticpreparation of chrom ium powder[J].M etall.M ater.Trans.B.,2004,35:223~233.
[5]Gordo E,Chen G Z,Fray D J.Toward optim isation ofelectrolytic reduction of solid chrom ium oxide to chrom i-um powder in molten chloride salts[J].E lectroch im.Acta,2004,49:2195~2208.
[6]Noh ira T,Yasuda K,Ito Y.P inpoint and bu lk electro-chem ical reduction of insu lating silicon d ioxide to sili-con[J].Nat.M ater.,2003,2:397~401.
[7]Jin X ianbo,Gao Pe i,W ang D ihua,et al.E lectrochem-ical preparation of silicon and its alloys from solid ox-ides in molten calc ium chloride[J].Angew.Chem.Int.Ed.,2004,43:733~736.
[8]Chen G Z,Fray D J.Voltamm ertic stud ies of the oxy-gen-titan ium b inary system in molten calc ium chloride[J].J.E lectrochem.Soc.,2002,149(11):E455~E467.
[9]CHA C.S.(查全性).Introduction to E lectrode K inet-ics[M].3rdEd.,Be ijing:Sc ience Press,2002.
[10]Q iu Guohong,M aM eng,W ang D ihua,et al.M etalliccavity electrode for investigation of powders:electro-chem ical reduction of N iO and Cr2O3powder in moltenCaC l2[J].J.E lectrochem.Soc.,2005,152:E328~E336.
[11]Gao Pe i,Jin X ianbo,W ang D ihua,et al.A quartzsealed Ag/AgC l reference electrode for CaC l2basedmolten salts[J].J.E lectroanal.Chem.,2005,579:321~328.
[12]L iu H,Stack M M,Lyon S B.Reactive elem enteffects on the ion ic transport processes in Cr2O3scales[J].Solid State Ion ics,1998,109:247~257.
[13]Bard A J,Fau lkner L R.E lectrochem icalM ethods—Fundam entals and App lications[M].1 st and 2ndEd.,New York:John W iley&Sons,Inc.,1980~2001.
Included in
Catalysis and Reaction Engineering Commons, Engineering Science and Materials Commons, Materials Chemistry Commons, Materials Science and Engineering Commons, Physical Chemistry Commons, Power and Energy Commons
