conjugated porous polymer RSC Advances 2015

《conjugated porous polymer RSC Advances 2015 》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、RSCAdvancesPAPERSulfur-dopedporouscarbonnanosheetsashighperformanceelectrocatalystsforPhotoFuelCells†Citethis:RSCAdv.,2015,5,27953abbcadStavroulaSfaelou,‡XiaodongZhuang,‡XinliangFeng*andPanagiotisLianos*Sulfur-dopedporouscarbonnanosheetshavebeenpreparedbypyrolysisofgraphene-coupledconjugated

2、microporouspolymersunderaninertatmosphere.Theobtainedcarbonnanosheetsexhibitedlargespecific2
1surfaceareasupto642mgandhighsulfurweightcontentupto7.11%.Thesehighlyporouscarbonnanosheetshavebeenstudiedasmetal-freeoxygenreductionelectrocatalystsinalkalineenvironmentsandtheywerefoundtoundergooxyg

3、enreductionviaamajor4-electrontransferpathway.TheywereReceived2ndFebruary2015thenexaminedassubstitutesforPt–carbonelectrocatalystsinPhotoFuelCellsfunctioningintheAccepted12thMarch2015presenceofethanolasamodelfuel.IthasbeenshownthatsulfurdopedporouscarbonnanosheetsDOI:10.1039/c5ra02027ayieldf

4、unctionalcellswithapproximatelythesamecharacteristicsasthoseemployingPt–carbonwww.rsc.org/advanceselectrocatalysts,therefore,theymarkanewclassofmetal-freecatalysts.1.IntroductionorCO2reduction.Alesscommoncongurationforaphoto-electrochemicalcellinvolvesaphotocathodeelectrodeConversionofsolar

5、energysimultaneouslywithchemicalcarryingap-typephotocatalystwhiletheanodeelectrodeenergyandelectricityisachievedbymeansofphoto-carriesanoxidationelectrocatalyst.Thepresentworkwilldealelectrochemicalcells.Astandardcongurationforaphoto-withastandardcellemployingaphotoanodeandn-typeelectrochem

6、icalcellinvolvesaphotoanodeelectrodecarryingsemiconductorphotocatalyst.Inbothtypesofcells,theann-typesemiconductorphotocatalyst,acounterelectrodeenergyofphotonsandthechemicalenergyofthesacricialcarryinganelectrocatalystandanelectrolyte.Lightisabsor-agent,i.e.ofthe“fuel”,areconvertedintoelec

7、tricityand/orbedbythephotocatalystgeneratingelectron–holepairs.storedinausefulformofchemicalenergy,forexample,Electronsareguidedthroughanexternalcircuittothecathodehydrogen.Forthisreason,photoelectrochemicalcellsoper-(counter)electrode,wheretheytak