电芬顿体系中高效气体扩散电极的.研究与制备

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1、AbstractInElectron-Fenton,hydrogenperoxideisproducedatcathode,duetolowproductionefficiencyandlowcurrentefficiency,graphitegasdiffusionelectrodeswithhighcatalysisactivitytotheelectro-generationofhydrogenperoxidearedeveloped.Comparingtoactivedcarbonfiber(A

2、CF)electrode,graphiteelectrodeandactivedcarbongasdiffusionelectrode,thegraphitegasdiffusionelectrodehadmorefunctionaladvantages.ThemorphologyoftheelectrodewasobservedbymeansofSEMandtheperformanceofthegraphitegasdiffusionelectrodeswastestedbymeansofTG,DSC

3、andCV.Preparationmethodsofthegraphitegasdiffusionelectrodeshadabiginfluenceonthefunctionofelectrodes.Experimentalresultsshowedthatwhentheelectrodeswascalcinedat350℃for1handthemassratiosofgraphite:polytetrafluorethylenewasof2:1,thecatalysisactivityoftheel

4、ectrodeswasthehighest.TheoperationalparametersaspH、currentintensityandtemperatureinfluencedtheproductionofhydrogenperoxidegreatly.TheresultsshowedthatatpH=3~9thecatalysisactivityoftheelectrodeswashigherandstable,onlyatpH=1thecatalysisactivitybeinglower.W

5、henthecurrentdensitywas3-2mA·cm,thecatalysisactivityoftheelectrodeswasthehighest.Temperaturehaseffectonthissystematlessextent.ThegraphitegasdiffusionelectrodewasmodifiedinsolutioncontainingHNO3andH3PO4.Theperformanceofelectrodewhichwasmadefrommodifiedgra

6、phitepowerwasbetter.WhenpHvalueofthesolutionwas3,thecurrentefficiencywashigherthan72%,andtheconcentrationofH2O2achieved-1274.5mg·L,duringtheelectrolysisfor150min.万方数据KeywordsElectro-Fenton;Cathodematerial;Gasdiffusionelectrode;Modifiedelectrode;Hydrogenp

7、eroxide万方数据目录第1章绪论.......................................................................................................11.1ELECTRO-FENTON技术原理....................................................................21.1.1Electro-Fenton机理.....................

8、......................................................21.1.2阴极氧还原产生过氧化氢................................................................31.2ELECTRO-FENTON的研究进展................................................................