%0 Journal Article
%T Solutionphasesynthesisofhalogenatedgrapheneandtheelectrocatalyticactivityforoxygenreductionreaction
%A Kuang-Hsu Wu
%A Da-Wei Wang
%A Qingcong Zeng
%A Yang Li
%A Ian R. Gentle
%J ´ß»¯Ñ§±¨
%P 884-890
%D 2014
%R 10.1016/S1872-2067(14)60108-X
%X £¿Metal-freecarbonelectrocatalytsfortheoxygenreductionreaction(ORR)areattractivefortheirhighactivityandeconomicadvantages.However,theoriginoftheactivityhasneverbeenclearlyelucidatedinasystematicmanner.Halogengroupelementsaregoodcandidatesforelucidatingtheeffect,althoughithasbeenadifficulttaskduetosafetyissues.Inthisreport,wedemonstratethesynthesisofCl-,Br-andI-dopedreducedgrapheneoxidethroughtwosolutionphasesyntheses.WehaveevaluatedtheeffectivenessofdopingandperformedelectrochemicalmeasurementsoftheORRactivityonthesehalogenatedgraphenematerials.OurresultssuggestthatthehighelectronegativityofthedopantisnotthekeyfactorforhighORRactivity;bothBr-andI-dopedgraphenepromotedORRmoreefficientlythanCl-dopedgraphene.Furthermore,anunexpectedsulfur-dopinginacidicconditionssuggeststhatahighlevelofsulfidecandegradetheORRactivityofthegraphenematerial.
%K Halogen-doping
%K Sulfur-doping
%K Graphene
%K Oxygenreductionreaction
%K Electrocatalyst
%U http://www.chxb.cn/CN/abstract/abstract21348.shtml