Value-added products synthesis by the one-step CO₂ hydrogenation reaction has attracted much attention of researchers. In this paper, three catalysts: Cu/V-AlPILC,CuFe/V-AlPILC, and CuCo/V-Al PILC, prepared by impregnation method on Al-pillared clay support were studied. The effect of Fe and Co additives on the physicochemical properties of Cu-based catalysts was characterized by X-ray powder diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscope (SEM), N₂ adsorption/desorption isotherms, temperature programmed reduction (TPR), Transmission Electron Microscope (TEM), X-ray photoelectron spectroscopy (XPS), N₂O decomposition, CO₂ and NH₃ temperature-programmed desorption (CO₂-TPD and NH₃-TPD), and Fourier Transform Infrared Spectroscopy after gaseous pyridine adsorption (Py-FTIR) techniques. These catalysts were evaluated for CO₂ hydrogenation into value-added products at temperatures ranging from 250 to 300 °C for 3 h and 40 bar pressure. Stability test was performed at 250 °C for 24 h and 40 bar pressure. The catalytic behavior revealed that a linear relationship does exist between the CO₂ conversion with the metallic area. The DME and methanol synthesis showed a correlation with the basic and acid sites. The CuFe/V-Al PILC catalyst showed the highest selectivity for methanol and DME at 250 °C.

通过一步式CO ₂加氢反应合成增值产品引起了研究人员的广泛关注。本文研究了在铝桩粘土载体上浸渍法制备的三种催化剂：Cu / V-AlPILC，CuFe / V-AlPILC和CuCo / V-Al PILC。通过X射线粉末衍射（XRD），能量色散X射线能谱（EDS），扫描电子显微镜（SEM），N ₂吸附/脱附来表征Fe和Co添加剂对Cu基催化剂理化性质的影响。等温线，程序升温还原（TPR），透射电子显微镜（TEM），X射线光电子能谱（XPS），N ₂ O分解，CO ₂和NH ₃程序升温脱附（CO ₂ -TPD和NH ₃ -TPD），以及气态吡啶吸附（Py-FTIR）技术后的傅立叶变换红外光谱。在250至300°C的温度下3小时和40 bar的压力下，对这些催化剂进行了CO ₂加氢成增值产品的评估。在250°C下进行了24小时和40 bar压力的稳定性测试。催化行为表明，CO ₂转化率与金属面积之间确实存在线性关系。二甲醚和甲醇的合成显示出与碱性和酸性位点的相关性。CuFe / V-Al PILC催化剂在250°C下对甲醇和DME具有最高的选择性。