A　series　of　CoMgAl　mixed　oxides　with　homogeneous　Co　dispersion　were　prepared　using　co-precipitation　method.　The　CoMgAl　composites　were　then　doped　with　Mo　species,　giving　Mo/Co(x)MgAl　(x=Co/(Co　+　Mg))　catalysts　for　water-gas　shift　reaction　(WGSR).　In　the　synthesis　of　these　catalysts,　there　is　limited　release　of　ammonia,　which　is　traditionally　common　in　the　generation　of　Mo-Co　catalysts　for　WGSR.　The　Mo/Co(x)MgAl　catalysts　were　characterized　using　techniques　such　as　XRD,　N-2-physisorption,　H-2-TPR,　H2S-TPS,　Raman,　HRTEM　and　XPS.　It　is　noted　that　the　Mo/Co(5%)MgAl　catalyst　gives　91.2%　CO　conversion　at　350　degrees　C,　which　is　close　to　the　equilibrium　CO　conversion　(91.7%).　The　H2S-TPS　results　disclose　that　there　is　decrease　in　activation　energy　for　Mo　sulfidation　with　increase　of　Co　content　in　Mo/Co(x)MgAl,　indicating　the　presence　of　Co　promotes　Mo　sulfidation.　The　outcomes　of　HRTEM　and　XPS　analyses　reveal　that　the　role　of　Co　is　to　decrease　stacking　number　and　slab　length　of　MoS2　moieties.　The　EDX　elemental　analysis　suggests　synergism　between　Co　and　MoS2,　especially　in　the　case　of　Mo/Co(5%)MgAl.　With　the　formation　of　small-size　MoS2　slabs　and　enhanced　Co-MoS2　synergistic　effect,　the　Mo/Co(5%)MgAl　catalyst　has　high　exposure　of　active　sites,　leading　to　improved　catalytic　activities　in　WGSR.