conjugated porous polymer RSC Advances 2015

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

2、microporouspolymersunderaninertatmosphere.Theobtainedcarbonnanosheetsexhibitedlargespeci?c2
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