课堂作业综述-水氧化催化剂进展综述

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1、CatalystsforWaterOxidation:aShortReviewofRecentprogressesName:H.LiStudentID:21***0*Supervisor:L.SongField:OxidationofwaterAbstract:Recentprogressesinthefieldofcatalystforwateroxidationarereviewedinthisarticle.Waterisanabundantandlow-costreactantthatcanproduceH2andO2throughaph

2、otocatalyticreaction.Catalystsplayakeyroleinthisprogress.Thisarticlemakesabriefintroductionoftherecentprogressesinthefieldofthecatalystsbasedontransitionmetals.Finally,thefutureoutlookofwateroxidationcatalystswillbepresent.Keywords:wateroxidation;catalyst;review1IntroductionC

3、urrently,mostoftheenergysourcesweusearefromfossilfuels(oil,coals,naturalgas,etc.).Itcontributestoeconomicandsocialdevelopment,butitalsocausesvariousamountofproblemsuchasenergycrisis,excessiveemissionofgreenhousegasandglobalwarmingwhichbecomebigproblemhumanbeingsfacedwith.Newk

4、indsofcleanandrenewableenergyresourcemustbeexploredinthiscircumstance.Onealternativeenergysourceissolarenergywhichisbroadlyusedbythenaturetostoreenergy.Greenplantsandsomeotherorganismstransfersolarenergytochemicalenergythroughtheprogressofphotosynthesis.Sincethen,allkindsofli

5、vesappearedandsurvived.Itmaybequitefamiliartopeoplethathowthegreenplantscarryoutthephotosynthesis.Therearetworelativephotosystemsinthisprocess:photosystemI(P700)andphotosystemⅡ(P680).PhotosystemIproducecarbohydrates,andphotosystemⅡreleaseO2.Thephotosynthesisprocesses[1]happen

6、edinphotosystemⅡareillustratedinPic.1.P680isexcitedbyabsorptionofphotonstoformtheexcitedstateP680*.Afterthat,electronsofP680*aretransferredtoaseriesofacceptors,finallytoPSI.Atthesametime,P680+generatingfromtheformerstepoxidizethetyrosine(TyrZ)toTyrZradicalspecies.Finally,wate

7、risoxidizedbyTyrZ*andformO2inthepresentofcatalyst-CaMn4O4.Pic.1WorkingprincipleofPSⅡInspiredbythispowerfulnaturalprocess,theno-carbonandrenewablesolarenergyisexploredtodealwiththegreatproblemshumanbeingfacedwith.Therearetwomainwaystoutilizesolarenergy:high-efficientsolarcells

8、andlight-spurredwatersplittingsystems.However,solarcellscandirectlyc