Promotion of direct electron transfer between CN32 and carbon fiber electrodes via growth of α-FeO nanoarray.

The iron transport system plays a crucial role in the extracellular electron transfer process of . In this study, we fabricated a vertically oriented α-FeO nanoarray on carbon cloth to enhance interfacial electron transfer in CN32 microbial fuel cells. The incorporation of the α-FeO nanoarray not only resulted in a slight increase in flavin content but also significantly enhanced biofilm loading, leading to an eight-fold higher maximum power density compared to plain carbon cloth.