Nanoflower-like MoS₂ anchored on electrospun carbon nanofiber-interpenetrated reduced graphene oxide as a microbial fuel cell anode achieving high power density

Abstract

Weak biofilm habitation and sluggish extracellular electron transfer (EET) between the biofilm and anode are major obstacles to achieving a high power density in microbial fuel cells (MFCs). Tailoring the...

Carbon nanofiber/graphene hybrids anchoring Fe, N, and S heteroatoms simultaneously enhancing extracellular electron transfer and biofilm adhesion in microbial fuel cells

“…These differences can be partially attributed to the volatilization of PVP during the pyrolysis process, which formed N-containing reactive species that can etch the surface of the CNFs. 23,30 Additionally, the introduction of S could also induce the formation of defective structures on the CNFs, leading to a rough surface. 31 The FeS/Fe 3 C@NCNFs/rGO aerogel (Fig.…”

“…It was worth noting that the FeS/Fe 3 C@NCNFs/rGO-modified anode revealed the highest specific capacitance of 31.71 mF cm −2 , which was significantly higher than that of FeS/Fe 3 C@NCNFs (6.38 mF cm −2 ), NCNFs (1.74 mF cm −2 ) and pristine CC (0.29 mF cm −2 ) anodes. The high specific capacitance indicated that more electrons can be stored in the materials leading to a stronger current response, 2,30,36 which can be attributed to the abundant active sites on the surfaces of the Fe, N, and S co-doped CNFs.…”

“…Amongst them, Bacteroidota , Firmicutes , Proteobacteria , and Desulfobacterota have all been demonstrated to contain electroproducing bacteria. 5,30,43 Meanwhile, Firmicutes and Actinobacteriotas are crucial phyla associated with the hydrolysis of organic matter. 44 Rhodococcus , Dysgonomonas , Chryseobacterium , Bacillus , and Petrimonas were the dominant species on different anode biofilms at the genus level as shown in Fig.…”

Fe/Fe3C nanoparticles in situ-doped with carbon nanofibers embedded in rGO as high-performance anode electrocatalysts of microbial fuel cells

“…The combination of carbon-based materials and transition-metal-based materials has also been demonstrated to be an effective strategy for performance enhancement of MFCs. 12,16–18 Liu et al 25 designed a three-dimensional composite structure (rGO/CNF@MoS 2 ) as an anodic electrocatalyst of MFCs, which consisted of carbon nanofibers and reduced graphene oxide (rGO) with uniformly loaded MoS 2 nanoflowers. This MFC with an rGO/CNF@MoS 2 anode achieved an impressive power density of 3584 mW m −2 , which was mainly attributed to the huge specific surface area provided by the three-dimensional structure.…”

A facile synthesis of FeS/Fe3C nanoparticles highly dispersed on in situ grown N-doped CNTs as cathode electrocatalysts for microbial fuel cells

“…4–6 In MFCs, anodes are attached by microorganisms that generate electrons by oxidatively decomposing organic compounds in wastewater, while cathodes accept the electrons through the oxygen reduction reaction (ORR) of oxygen on the air cathode. 7,8 The power density of currently available MFCs is limited by slow anode and cathode reaction kinetics, which have been attracting much research interest. 9–12 On the cathode, there are two paths for the ORR to take place.…”