A co-doped oxygen reduction catalyst with FeCu promotes the stability of microbial fuel cells

Highly efficient Fe–Cu dual-site nanoparticles supported on black pearls 2000 (carbon black) as oxygen reduction reaction catalysts for Al–air batteries

“…59 According to the latest reports, the density of states of the Fe (dorbital) near the Fermi level is higher than that of Cu. 52,60,61 The signicantly elevated electron density on Fe hampers the adsorption of intermediate substances in oxygen reduction. The oxygen adsorption capacity of Cu is superior to that of Fe, whereas the interaction between Fe and reactive oxygen species exhibits greater strength.…”

“…62 The strong electron transfer from Cu to Fe facilitates the rapid dissociation of O-O on the Cu surface, leading to the generation of reactive oxygen species that promptly bind with Fe upon splitting. 60 The ndings imply that this distinctive electronic interaction in bimetallic site catalysts presents novel prospects for enhancing the efficiency of catalysts devoid of precious metals, particularly in fuel cells, metal-air batteries, and other renewable energy systems.…”