The Co/CeO_2-δ catalysts with different morphology structure were prepared for CO₂ catalytic hydrogenation reaction. The physical and chemical properties of these catalysts were characterized by H₂-TPR, XRD, TEM, ICP and H₂-TPD. The characterization results indicated that the different morphology structure of CeO₂ support obviously influence the exposed crystal plane, and then affect the concentration of oxygen vacancies, the metal-support interaction and the dispersion of Co⁰ active species on the CeO₂ support. In addition, the Co ions can be dissolved into the CeO₂ lattice to form Ce–O–Co solid solution, which promotes the formation of Co⁰ active species, oxygen vacancies, and the Ce³⁺-□-Co⁰ structure, thus significantly affects the CO₂ hydrogenation performance of Co/CeO_2-δ catalysts. The exposed {110} and {100} crystal plane of CoCe140 catalyst with nano-rods structure ensure the excellent CO₂ hydrogenation performance, including CO₂ conversion is 48.7%, the CH₄ and CO selectivity are 91.7% and 8.3%, respectively.

制备了具有不同形态结构的Co / CeO2 _-δ催化剂用于CO ₂催化加氢反应。这些催化剂的物理和化学性质通过H ₂ -TPR，XRD，TEM，ICP和H ₂ -TPD表征。表征结果表明，CeO ₂载体的不同形态结构明显影响暴露的晶面，进而影响氧空位浓度，金属-载体相互作用以及Co ⁰活性物种在CeO ₂载体上的分散。另外，Co离子可以溶解到CeO _2中晶格形成Ce–O–Co固溶体，该固溶体促进Co ⁰活性物种，氧空位和Ce ³⁺ -□-Co ⁰结构的形成，从而显着影响Co / CeO _2-的CO ₂加氢性能_δ催化剂。具有纳米棒结构的CoCe140催化剂暴露的{110}和{100}晶面确保了优异的CO ₂加氢性能，其中CO ₂转化率为48.7％，CH ₄和CO的选择性分别为91.7％和8.3％。