LAUSR

Ni3−xCoxO4 nanorods with different Ni/Co ratios were fabricated on Ni foam using a controllable process. The conversion of CO for Ni2CoO4 nanorods was the highest during the whole methanation reaction process. The design of the Ni3−xCoxO4 nanorods with different Ni/Co ratios is the origin of the different catalytic activity. The synergistic effect of Ni and Co also tunes the product selectivity, thus controlling the heating value of synthetic natural gas. The nanorods directly grown on the Ni foam can ensure efficient anchoring of the nanorods. The designed synthesis of the Ni3−xCoxO4 nanorods with different Ni/Co ratios provides a new strategy for controlling the catalytic activity and selectivity of syngas methanation.