Enhancement of Basic Sites and Oxygen Vacancies in Rare Earth Modified Nickel-Layered Double Hydroxide Catalysts for Efficient Carbon Dioxide Methanation

CO2 methanation is a practical solution to solve the global greenhouse effect and achieve the carbon neutrality goal.However, the challenge of efficient conversion at low temperatures has yet to be overcome.Herein, we synthesized nickel-based layered double hydroxide (Ni-LDH) catalyst by the hydrothermal method, and further introduced rare earth metals (La, Ce) to prepare Ni/La-LDH and Ni/Ce-LDH catalysts applied in carbon dioxide (CO2) hydrogenation to methane.Systematic