Bimetallic hybrids modified with carbon nanotubes as cathode catalysts for microbial fuel cell: Effective oxygen reduction catalysis and inhibition of biofilm formation

Three-dimensional hierarchical flower-like bimetallic–organic materialsin situgrown on carbon cloth and doped with sulfur as an air cathode in a microbial fuel cell

“…28 The different valence states of Co can easily accept and provide electrons, forming an “electron flow” from the catalyst to the oxygen, thus promoting ORR. 29…”

Boosting microfluidic microbial fuel cells performance via investigating electron transfer mechanisms, metal-based electrodes, and magnetic field effect

“…Ahmed and Kim demonstrated that cathodic biofilm could reduce the generated power up to 20% 56 . So, novel cathode catalysts with antibacterial activity were developed to inhibit biofilm formation on the cathode surface improved bioelectricity generation 57 , 58 .

Figure 6 Scanning electron microscopy (SEM) images of the ( A ) Escherichia coli and ( B ) Shewanella oneidensis MR-1 biofilm on the anode and cathode surface areas of the microfluidic MFCs.

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Engineered nanomaterials in microbial fuel cells – Recent developments, sustainability aspects, and future outlook

“…Effective oxygen reduction efficiencies have also been addressed through the application of CNMs. For instance, carbon nanotubes decorated co-doped with cobalt and nitrogen (CuCo@NCNTs) prepared from a straightforward immersion and pyrolysis process represented high EOR capability as well as antibacterial performance, which prevents the biofilm formation on the cathode [105]. Such an approach was adopted by Yang et al, [106] for the synthesis of cobalt oxide NPs grown onto N-doped carbon nanotubes through controlled pyrolysis of the precursors such as graphitic carbon nitride and cobalt acetate.…”