Three-dimensional graphene nanosheets as cathode catalysts in standard and supercapacitive microbial fuel cell.

ABSTRACT: Three-dimensional graphene nanosheets (3D-GNS) were used as cathode catalysts for microbial fuel cells (MFCs) operating in neutral conditions. 3D-GNS catalysts showed high performance towards oxygen electroreduction in neutral media with high current densities and low hydrogen peroxide generation compared to activated carbon (AC). 3D-GNS was incorporated into air-breathing cathodes based on AC with three different loadings (2, 6 and 10 mgcm^-2). Performances in MFCs showed that 3D-GNS had the highest performances with power densities of 2.059 ± 0.003 Wm^-2, 1.855 ± 0.007 Wm^-2 and 1.503 ± 0.005 Wm^-2 for loading of 10, 6 and 2 mgcm^-2 respectively. Plain AC had the lowest performances (1.017 ± 0.009 Wm^-2). The different cathodes

SUBMITTER: Santoro C 

PROVIDER: S-EPMC5465940 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature