Comparison of performances of bioanodes modified with graphene oxide and graphene–platinum hybrid nanoparticles

• Graphene oxide (GO) and graphene–platinum hybrid nanoparticles (Gr–Pt hybrid NPs) were synthesized and characterized.
• They were introduced into glassy carbon paste electrode and utilized as bioanodes.
• First comparison work of performances of GO and Gr–Pt hybrid NPs in biofuel cell systems.
• Incorporation of graphene based nanomaterials into fabricated BFC significantly increases the power density of the system.

The performances of graphene oxide (GO) and graphene–platinum hybrid nanoparticles (Gr-Pt hybrid NPs) were compared for biofuel cell (BFC) systems. This is the first study that constitutes these nanomaterials in BFC systems. For this purpose, fabricated bioanodes were combined with laccase modified biocathode in a single cell membraneless BFC. Power and current densities of these systems were calculated as 2.40 μW cm− 2 and 211.90 μA cm− 2 for GO based BFC and 4.88 μW cm− 2 and 246.82 μA cm− 2, for Gr-Pt hybrid NPs based BFC. As a result, a pioneer study which demonstrates the effective performances of combination of graphene with Pt was conducted.