LAUSR

Abstract Annealing effect of amorphous Fe83.3Si3B10P3Cu0.7 precursor alloys on the formation of the nanoporous structure and their Redox behavior in alkaline conditions has been investigated. Annealing of amorphous Fe83.3Si3B10P3Cu0.7 alloy causes the formation of nanocrystalline hetero-amorphous microstructure coexisting α-Fe grains and residual amorphous phase. Preferential dissolution of α-Fe grains in H2SO4 solution leads to the formation of nanoporous structure. The nanoporous electrodes due to the larger specific surface area show the better Redox performance than the nonporous counterpart electrodes. The nanoporous electrodes with almost one-order higher peak current densities than nonporous ones can be good candidates of the negative electrodes of Fe-air battery.