電催化合成過氧化氫及氧還原動力學(xué)研究.pdf

1、北京化工大學(xué)碩士學(xué)位論文電催化合成過氧化氫及氧還原動力學(xué)研究姓名：孫鯤鵬申請學(xué)位級別：碩士專業(yè)：工業(yè)催化指導(dǎo)教師：陳靄璠杜俊岐2001.5.22北京化I‘人學(xué)碩十論文J【j紙ELECTRoSYNTHESISoFALKALlNEHYGRoGENPERoXIDEANDSTUDYONELECTRODEKINETICSoFoXYGENREDUCTlONABSTRCTThesynthesisofhydrogenperoxideinaprotone

2、xchangemembrane(Nafion)electrochemicalreactorwasexploredTheelectrodekineticparametersfortheelectrocatalyticreductionofoxygenonporousgas—diffusionelectrodeswereobtainbymeasuringtherelationsofcellpotentialandcurrentdensity

3、OxygenacceptedtwoelectronsfromareducedmediatortoformhydrogenperoxideThecatalyticreductionwascontrolledbythefirstelectronexchangestepatlowercurrentdensityregionandbythemasstransferprocessofdissolvedoxygeninthecathodicsolu

4、tionathii曲ercurrentdensityregionAnexperimentalcellofelectrolysisforalkalinehydrogenperoxidewaspresented，andtheeffectsofelectrodestructure，electrocatalyticmaterialandoperationconditionsuchastemperature，oxygenpressureandce

5、llpotentialontheperformanceofelectrolysiswerediscussedThesteadystatepolarizationcurvesofoxygenevolutionweremeasuredattemperaturesbetween25～60“ConNianodein30wt％NaOHsolutionTheexchangecurrentdensities，Tafelslopesandtransfe

6、rcoefficientswerestudiedItwasfoundthat40“Cisaspecialtemperature，Heal“whichthekineticparameterschangedabruptlyInconclusion，theamplifiedreactorwasevaluatedthroughmeasuringthetechnicalparameterssuchascurrentefficiencypowerc