The interaction between metal and support is critical for CO₂ methanation reaction over supported Ni catalysts. This work provides a modification strategy using surface carbonate species for promoting the catalytic performances of lanthana-supported Ni catalyst. The carbonate-modified Ni/La₂O₂CO₃ catalyst displays a superior catalytic activity, stability, and CO tolerance in CO₂ methanation reactions in comparison with Ni/La₂O₃ catalyst. The structure of Ni-La₂O₂CO₃ interfaces is verified to be stable against thermal decomposition and reduction reaction, determining catalytic roles through specific metal-carbonate interaction. The medium-strength surface basicity promotes the capability of CO₂ chemisorption. The carbonate-modified interfaces facilitate the formation of monodentate and bidentate formates as the reaction intermediates. These species are highly reactive for further transformation into CH₄ even in the presence of CO poison, which is benefited to both methanation activity and anti-CO ability.

金属和载体之间的相互作用对于负载型Ni催化剂上的CO ₂甲烷化反应至关重要。这项工作提供了一种使用表面碳酸盐种类的改性策略，以促进镧系负载的Ni催化剂的催化性能。与Ni / La ₂ O ₃催化剂相比，碳酸盐改性的Ni / La ₂ O ₂ CO ₃催化剂在CO ₂甲烷化反应中显示出优异的催化活性，稳定性和CO耐受性。Ni-La ₂ O ₂ CO _3的结构界面经验证对热分解和还原反应稳定，并通过特定的金属碳酸盐相互作用确定催化作用。中等强度的表面碱性提高了CO ₂化学吸附能力。碳酸盐改性的界面促进了单齿和双齿甲酸酯作为反应中间体的形成。这些物种即使在存在CO毒物的情况下也具有很高的反应性，可以进一步转化为CH ₄，这对甲烷化活性和抗CO能力均有利。