Ordered mesoporous Ni-Co/Al2O3 nanocomposites were synthesized for use as CO2 methanation catalysts via an evaporation-induced self-assembly method. Owing to its improved H-2 chemisorption capacity, the ordered mesoporous Ni-Co/Al2O3 catalyst with 10 wt% NiO and 3 wt% Co3O4 (10N3COMA) exhibited enhanced catalytic activity, which achieved the maximum CO2 conversion of 78% and CH4 selectivity of 99% at 400 degrees C, 0.1 MPa, 10000 mL g(-1) h(-1). In the 60 h-lifetime test, the ordered mesoporous 10N3COMA catalyst showed superior anti-sintering property at 500 degrees C due to the confinement effect of the ordered mesostructure. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.