Abstract
Ferrous disulfide (FeS2) decorated S, N co-doped graphene quantum dots (S, N GQDs) (FeS2-S, N GQDs), were synthesized using a facile approach involving a straight hydrothermal method and tested as bioanode in acetate-feeding microbial fuel cells (MFCs) based on a mixed bacterial culture with superior performances. The physical characterizations FeS2-S, N GQDs corroborate the unique configuration that is desirable for bacteria immobilization and effective electrolyte transport. The electrochemical measurements prove the superior performance of the bifunctional electrocatalysis of FeS2-S, N GQDs for the conversion of biomass into electricity through bacteria. Significantly, at a steady-state of the power generation, the acetate-feeding MFC with FeS2-S, N GQDs as activated biomass anode delivers a maximum power density 1128 ± 9 mW/m2, which is 48% and 76% higher than the one using S, N GQDs (585 ± 7 mW/m2) and carbon cloth (265 ± 3 mW/m2) as anode electrocatalyst. With these merits, the bioanode facilitates the activity towards redox reactions of cytochromes in bacteria and exhibits higher maximum power density and stronger stability than the conventional carbon cloth. This report provides a new concept of anode electrocatalyst fabrication for the application of MFC in electricity generation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.