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Abstract

The electrochemical oxidation of Mn (Ⅱ) to Mn(Ⅱ) in concentrated H_2SO_4(2 ̄8 mol . L-1) at lead electrede has been studied. It is found that the electrede surface is oxidized toPbO_2 in a direct electrochemical reaction, then PbO_2formed reacts with Mn (Ⅱ) in a chemicalreaction. Some effects involves current density , concentration of H_2SO_4 , temperature and conversionwere evaluated. The rule of electrogenerated Mn (Ⅲ) in flow electrolysis cell were determined atseveral conditions. The current efficiency at greater than 90% is obtained in general.

Keywords

Electrochemical oxidation, Manganic ion, Manganous ion, Lead electrode

Publication Date

1995-05-28

Online Available Date

1995-05-28

Revised Date

1995-05-28

Received Date

1995-05-28

References

1AnderssonS,LarsT.Reactionnetworksinthecatalyticvapor-phaseoxidationoftolueneandxylenes.J.Catal.,1986,98:138~1492YokoyamaT,SetoyamaT,FujitaN,NakajimaM,Maki,T,Noveldirecthydrogenationprocessofaromaticcarboxylicacidstothecorrespondingaldehydeswithzirconiacatalyst.ApplCatol.,1992,88:149~1613葛欣,张惠良.甲苯选择氧化制苯甲醛.石油化工,1994,23:514~5494TutundzicP,MladenoricS.Quantitativeelectrolytischeerzeugungvonpormanganationen.Anal.Chim.Acta.,1955,12:382~3895SelimRG.LinganeJJ.Coulometrictitrationwithhigheroxidationstatesofmanganase,electrolyticgenerationandstabilityof+3manganeseinsulfuricacidmedia.Anal.Chim.Acta.,1959,21:536~5446VarmaR,MelendresCA,YaoNP.InsituidentifieationofsurfacephasesonleadelectredesbylaserRamanspectroscopy.J.Electrochem.Soc.,1980,127:1416~14187WellsC.F.Hydrolysisofthetripositiveionsofthefirsttransitionseries:adiscussionoftheheatsandentropiesforthedissociationofthefirstproton.Nature,1965,205:6938ComninellisC,PlattnerE,JavetP.Theoxidationofo-nitrotoluenetoo-nitrdenzaldehydewithelectrogeneratedcobalticsulphate.J.ApplElectrochem,1979,9:753~755

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