堿性介質(zhì)空氣電極高效催化劑的研究.pdf

1、重慶大學(xué)碩士學(xué)位論文堿性介質(zhì)空氣電極高效催化劑的研究姓名：黃文章申請學(xué)位級別：碩士專業(yè)：物理化學(xué)指導(dǎo)教師：張勝濤魏子棟19990501莖鏖查堂堡主蘭堡壘塞莖苧塑墨ABSTRACTAnairelectrodeiswidelyusednotonlyinfoeleellandmetalairbatteriesbutalsoinelectrolysisindustryaswellinwhichtheperformanceoftheairelec

2、trodeisofimportanceTheinvestigationofairelectrodes，therefore，iscriticalforthedevelopmentoffullcellsandelectrolysisindustryIntllisarticlealka]inezincairbatteriesanda11sortsoffactorswhicha丘bcttheairelectrodefunctionhavebee

3、nstudiedMn02andMn304，twelativelycheapandeasilypreparedsubstances，havebeenappliedasthecatalystforoxygenreductioninairelectrodeMn02，theactiveingredientofthecatalyst，ispreparedbythedecompositionofmanganesenitrateatdifferent

4、temperaturesItisreveaiedmatMn02preparedat3400Cdisplaysthehigllestqualitybecauseofsmallcrystallinegrain，highscatteringrate，highefficientporevolumeandbigspeciificsurfaceareaXRDanalysisalsodemonstratesthattheMnO，preparedat3

5、400Cisrichincrystalswithdvalueof272AThedecompositionof(Mn(N03)26H20)at3400CwithMn304asadditivehasbeenconductedIRandXRDanalysisshowesthatMn304canpromptthedecompositionprocess，offsetthenegativecffectofN03owingtoincompleted

6、ecompositionandinduceMn(N03)2toformMn02crystalwithdof272A，andimprovtheMn02catalyticactivitytoagreatextentThecatalyticactivityofMn02～Mn304isfarhigllerthanthatofvaluablemetalAgTheeellvoltageofZincairbatterycanreachapproxim

7、ately11VatthedischargecurrentdensityoflOOmAcm～ThecatalystobtainedbythedecompositionofthemixtureofMn(N00，6H，0andMn，0wi也也ecarrierofactivecarbonthatat34礦Cisnotasgoodasthatwithcarbonblackalsoat340uCTheMn30doesnotparticipatet

8、heprocessofMnO，formationasactivecarbonisusedthecarrierbecauseofMn30^isblockedintheoutsidesurfaceofactivecarbonporesbutnotabsorbedintothcinsidesurfacetogetherwiththesolutionofMnfN03)26H20Withthecombinationof10％Mn02and15％M