Fe-Cr-O and Fe-Mg-O catalysts were used for hydrogen production via the water-gas shift reaction. Fe-Cr-O catalysts were synthesized by different methods such as co-precipitation, impregnation and substitution technique. Catalysts were characterized by XRD, TG, BET and TPR. Addition of Mg improved the catalytic activity of Fe-O by favouring the development of small and well dispersed Fe particles (MgFe2O4). As a consequence, MgO prevented iron phase sintering in the presence of a large amount of water in the WGS reaction.