Advances and challenges about Ni-based dual functional materials for alternating cycles of CO2 storage and in-situ hydrogenation to CH4

The utilization of dual functional materials (DFMs) in integrated CO 2 capture and utilization (ICCU) has been attracted increasingly attention, with the conversion of CO 2 to CH 4 through the Sabatier reaction offering significant thermodynamic benefits. Ni, recognized for its catalytic efficiency among transition metals due to its cost-effectiveness and natural abundance while Ni-based DFMs have been favored to promote the conversion of CO 2 to value-added chemicals. In the past decades, significant efforts have been dedicated to developing more efficient Ni-based catalysts to enhance CO 2 conversion and CH 4 selectivity. This study researched the thermodynamic and kinetic aspects of ICCU and summarized the recent industrial process at first. Then, an overview of the advancements in Ni-based DFMs, including synthesis methods, support materials and promoters were provided. Next, the mechanisms of CO 2 methanation were also briefly addressed to provide a comprehensive understanding of the process. Finally, the future prospects were guided the development and application scenarios of Ni-based DFMs in the ICCU.