Research progress on construction of Ni/CeO2-based catalysts and their catalytic performances of CO2 methanation.

CO₂ hydrogenation to methane (also known as "CO₂ methanation") is an important way to achieve the goal of carbon neutralization. CeO₂ is considered as one of the most important catalyst supports because of its abundant surface oxygen vacancies and excellent oxygen storage capacity. Transition metal Ni is also widely studied because of its excellent catalytic performance and low price. The Ni/CeO₂-based catalysts formed by the combination of CeO₂ and metal Ni show good application prospects in CO₂ methanation. The reaction mechanisms of Ni/CeO₂-based catalysts for CO₂ methanation were summarized and the preparation methods of Ni/CeO₂-based catalysts were introduced, and the key parameters affecting catalytic performance of CO₂ methanation such as the characteristics of active centers, properties of supports, types of additives and metal-support interactions were summarized, and the catalytic performances of Ni/CeO₂-based catalysts were also summarized. It is found that by modifying Ni/CeO₂-based catalysts, the catalytic performances and product selectivities of Ni/CeO₂-based catalysts for CO₂ methanation can be regulated, which can provide new ideas for improving their catalytic performances of CO₂ methanation. [ABSTRACT FROM AUTHOR]