釹錳鈣鈦礦型氧化物制備及氧還原催化性能研究.pdf

1、中南大學碩士學位論文釹錳鈣鈦礦型氧化物制備及氧還原催化性能研究姓名：程翔申請學位級別：碩士專業(yè)：應用化學指導教師：周德璧20090522碩士學位論文目錄ABSTRACT，nlehighcatalyticandinexpensivecatalystapplyingtooxygenelectrodeisthekeyproblemonalkalinefuelcellsTheinexpensiveperovskite—typeoxideNdo6

2、Cao4Vln03waspreparedbysol—gelConventionalheatingandMicrowaveheatinginthisthesis；XRD，SEM，TEMwereemployedtocharacterizethepreparedcatalystsThepolarizationcurvetechnique，electrochemicalimpedencespectroscopy(EIS)methodsandth

3、echronoamperometry(CA)wereusedtostudytheelectrocatalyticperformancesofthepreparedoxidesforOxygenReductionReaction(ORR)inalkalinemediumWhenthecatalystwaspreparedbysol—gelConventionalheating，thepremonitorysolidgelatinWasma

4、de，thenfiredtosteadycomplicatedoxideTheoxidebehaveshighcatalyticperformance，givingadensityof82mA。cm～atthepotential一02V(vsHg／HgO)underairatmosphereand一141mA。cm～underoxygenatmosphereatroomtemperature，respectively；Aseriesof

5、factorswereconsideredduringpreparingprocessTheoxideNdo6Cao4Mn03WasalsopreparedbyMicrowaveheating，ThepreparedcatalystWasakindofwellproportionedandslightdiametergrain，cangetto1520nmTheoxidebehaveshighcatalyticactivity，givi

6、ngadensityof80mA‘cm“zatthepotential一02V(vsHg／HgO)underairatmosphereTheZinc／airfuelcellwasfabricated，thepreparedoxideasthecatalystofairdiffusionelectrode，andthedischargeperformanceofthe如elcellwasresearchThecarbonmateriali

7、sappliedasthegasdiffusionelectrodecarrieralsosuppliedactivesideforcatalyst，cancomplexaffectthecatalyticactivityofcatalystDuringprocessofcatalyzing，02adsorbedoncarbonmaterialssurfacefirstTheoxygenadsorptiononthesurfaceofg

8、raphitewasstudied，thisstudyisveryimportanttounderstandingtheORRcatalyticmechanismSo，thisadsorptionprocessisstudiedbyDFT(densityfunctionaltheory)methodsandmoduleDmol3ofMaterialsStudiosoftwareKEYWORDSfuelcell，oxygenelectro