Production of Sustainable Low-Layer Graphene by Green Synthesis at Room Conditions for Platinum-Based Direct Methanol Fuel Cell

ERDURAN V., BAYAT R., IŞIK İ., BAYAZIT T., ŞEN F.

ACS Engineering Au, 2023 - ACS Publications, 2023 (Hakemli Dergi)

Özet

In this study, a cost-effectiveand scalablemethodfor the productionof low-layergraphene(LLG)using sodiumpercarbonate(SPC)as a greendelaminationagentand itsapplicationin fuel cells is proposed.The obtainedgrapheneshoweda decreasein signal heightin XRD analysis,indicatingthinnerlayers.Ramananalysisconfirmedthe presenceof 7−8layers of graphene.Field-emissionscanningelectronmicroscopyanalysisrevealeda uniformcrystalstructure,makingit suitableforvariousapplications.Directmethanolfuel cells (DMFCs)arewidelyrecognizedas efficientand environmentallyfriendlydevicesfor convertingchemicalenergyto electricalenergy.The utilizationof graphene-supportedplatinum(Pt) nanoparticles(NPs)ascatalystsin DMFCsenhancestheir performance.In this study, Pt-graphenecatalystswere synthesizedby the chemicalreductionmethodwith grapheneobtainedby using SPC. CharacterizationthroughXRD and SEM analysesconfirmedthe homogeneousdistributionof NPs on the carbonsupport.As a result of methanoloxidationstudies,57.73 and 21.45 mA/cm2values were obtainedby using Pt@LLGand Pt catalysts,respectively.As a result of long-term stabilityand durabilitytests, it has been found that the Pt@LLGcatalystcan be used effectivelyin metal oxidationexperiments.

KEYWORDS:low layergraphene,carbon,greensynthesis,directalcoholfuel cells,electrocatalysts,platinum