Abstract

The iron oxide and Mo-modified iron oxide samples, which can store and produce pure hydrogen by the redox reaction (Fe 3O 4 (initial Fe 2O 3) + 4H 2 ↔ 3Fe + 4H 2O), were prepared via hydrothermal method. The redox performances of all samples were investigated, of which Fe 2O 3–7.5%Mo-a displayed the best one on enhancing hydrogen production. E.g., the average temperature of H 2 formation was only 277 °C; H 2 formation rate at 300 °C was 581–915 μmol min −1 Fe-g −1 from the first to fourth redox cycles; the average storage capacity was up to 4.7 wt% in four redox cycles.

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