甲醇電化學(xué)氧化紅外光譜循環(huán)伏吸及導(dǎo)數(shù)循環(huán)伏吸法研究.pdf

1、安徽大學(xué)碩士學(xué)位論文甲醇電化學(xué)氧化紅外光譜循環(huán)伏吸及導(dǎo)數(shù)循環(huán)伏吸法研究姓名：傅東祺申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：分析化學(xué)指導(dǎo)教師：金葆康201004甲醇電化學(xué)氧化紅外光譜循環(huán)伏吸及導(dǎo)數(shù)循環(huán)伏吸法研究IVAbstractThedevelopmentoffuelcellreactionmechanismweresummarizedfirstlyinthisarticle.Theadvantagesthereactionprincipleappli

2、cationprospectsofdirectmethanolfuelcellarealsopointedout.Atthesametimetheshtcomingsoffuelcellwerealsoreviewed.Theninfraredspectroscopycombiningwithinsituelectrochemicaltechniquewasusedtoinvestigatetheoxidizedreactionmech

3、anismproductsunderacidalkalinemedia.Finallycyclicvoltabsptometryderivativecyclicvoltabsptometryspectroelectrochemicaltechniquewereusedtoderivepossiblereactionmechanismofmethanoloxidative.1.Usingcyclicvoltammetrytechnique

4、insituFTIRspectroelectrochemicalCVAtechniquetostudymethanoloxidationinH2SO4solution.TheelectrochemicalresultssguuestthatoxidationofCH3OHinH2SO4onthescanningprocessofcyclicvoltammetryexistoxidationpeaksbutnoreductionpeak.

5、PoisonedintermediateCOisobservedfrominfrareddifferencespectratheintermediateofHCHOarealsoobservedbythetechnologyof3DinsituFTIR.TheCVADCVAtechniqueshowsthatthepossiblereactionmechanismisthatCH3OHadsbedontheelectrodesurfac

6、einH2SO4solutionfirstlythengraduallydeprotonationbuildcarbonoxygen、HCOHHCOOHfinally.2.MethanoloxidationinNaOHsolutionwasinvestigatedbyusingCVinsituFTIRspectroelectrochemicaltechnique.Theresultssuggestedthatdifferentoxida

7、tionmechanismoccurredinNaOHsolutioncomparedtoinsulfuricacidsolution.TheoxidationbeginatmuchlowerpotentialinNaOHsolutionthaninacidsolution.AlthoughHCOOcanbeobservedinoxidationprocessthepoisonedintermediateproductCOwasnotf

8、ound.WegottheinfmationofthefmationtransfmationofintermediateHCOObyCVADCVAtechniques.BasedonthestudyofdifferentconcentrationratioofNaOHCH3OHwefindthatthebiggertheconcentrationoftheNaOHthemepositivetheoxidationpeakisshifte