Design and construction of Ni3−xCoxO4 nanorods grown on Ni foam for tuning synthetic natural gas heating values

Abstract

Ni_3−xCo_xO₄ 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 Ni_3−xCo_xO₄ 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 Ni_3−xCo_xO₄ nanorods with different Ni/Co ratios provides a new strategy for controlling the catalytic activity and selectivity of syngas methanation.