Catalysts with different Fe/Cu molar ratios were prepared by co-precipitation method and evaluated under hydrogen-rich atmosphere (H-2 = 72.2 vol%). The effect of Fe/Cu ratio on the activity of Fe-Al-Cu catalysts for water gas shift reaction (WGSR) was investigated. The samples were characterized by X-ray diffraction (XRD), Temperature programmed reduction (TPR) and Brunauer-Emmett-Teller (BET) techniques. The results suggested that the optimal Fe/Cu ratio of Fe-Al-Cu catalyst was 1:1 and its highest CO conversion efficiency is 97.8% at 300 degrees C, excessive Cu resulted in poor catalytic activity. Fe-Al-Cu catalysts possessed a good activity at 250-550 degrees C and their CO conversions reached 87.3% and 84.6% at 250 degrees C and 550 degrees C, respectively, which is ascribed to the fact that copper not only acts as an active role for water gas shift reaction at 250 degrees C but also conducts as an electronic promoter in solid solution at higher temperature. Furthermore, magnetite had catalytic effect at higher temperature. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.