Alumina doped Fe2O3 foams by freeze-casting for redox cycling applications

Hydrogen is the next energy vector for a decarbonization society but industrial production still methane-based. The Steam Iron Process (SIP) could provide carbon-free and safety storage option. Here, we show that Fe2O3-3 wt% of Al2O3 foams created by freeze-casting withstand 10 redox cycles at different temperatures with no reduction in performance or pore shrinking. use stearic acid as dispersant agent/binder produces porous structure enhancement foam promotes early hematite phase during sintering. incorporation was detected solid solution Fe2O3 particle surface. This result relevant correlated positive values zeta potential observed. Freeze-casted improve long-term performances combining unique tailored interconnected specific chemical composition.