Preparation Of Matal Bis(Dithiolene) Functionalized Graphene Composites And Application For The Cathodic Catalyst In Fuel Cell

Direct methanol fuel cell(DMFC)is a new kind of energy conversion device,the fuel which use is a derived renewable energy?methanol,DMFC can oxide methanol into carbon dioxide and water directly without burning and continue to provide electricity,the thermoelectric conversion efficiency in theory can reach 85% ~ 90%,it is the promising green energy.In this dissertation,we fabricated a series of matal bis(dithiolene)/graphene composite catalysts by hydrothermally assisted ?-? assembly method.The physicochemical properties of fabricated matal bis(dithiolene)/graphene composite catalysts were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),ultraviolet-visible(UV-vis)absorption spectroscopy,fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD),respectively.The electrocatalytic performance of the matal bis(dithiolene)/graphene composite toward the ORR was evaluated using cyclic voltammetry and linear sweep voltammetry methods.The results showed that the assembled matal bis(dithiolene)/graphene composite catalysts display excellent catalytic activity for ORR,which is comparable to that of commercial Pt/C catalyst.The fabricated novel catalysts for ORR display high activity,good long-term stability,excellent tolerance to the crossover effect,following a 4-electron process,and composite method is simple,low-cost,environmental protection at the same time which may be used as excellent ORR catalysts in alkaline direct methanol fuel cell(DMFC).