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CO 2 methanation with Hydrogen to form CH 4 offers a solution for off-peak renewable energy storage. γ-alumina-supported Mo and Ni-Mo catalysts were used in CO 2 methanation, either in their reduced or in their carburized form. The presence of Ni improved the carburization extent of Mo-species, resulting in increased catalytic activity and selectivity for the catalytic CO 2 methanation reaction. Carburization generally enhances the basicity of the materials and thus CO 2 absorption on their surface. At 300˚C, the conversions of CO 2 for the reduced Ni-Mo/Al 2 O 3 catalyst and Ni-Mo 2 C/Al 2 O 3 catalysts were 5.3% and 13.8% respectively with a corresponding selectivity in CH 4 of 10.0% and 98.1%, respectively.

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