以层状硅酸铜为前驱体制备了不同焙烧温度下的层状Cu/SiO₂催化剂。利用N₂吸脱附、XRD、FT-IR、SEM、TEM、XPS等手段对催化剂的结构性质进行表征。结果表明，500℃下焙烧得到的催化剂比表面积大、Cu物种分散度最高、Cu颗粒尺寸均一，前驱体中层状硅酸铜的质量分数最高，还原后Cu⁺相对含量最高。将该催化剂应用于草酸二甲酯（DMO）选择性加氢制乙醇酸甲酯（MG），在2 MPa、200℃、H₂/DMO物质的量的比为100的反应条件下DMO的转化率为98.5%，MG的选择性为52.1%，并且层状Cu/SiO₂催化剂表现出良好的稳定性。

Layered Cu/SiO₂ catalysts are prepared at different calcination temperatures using copper phyllosilicate as precursor.The structural properties of the catalysts are characterized by means of N₂ adsorption and desorption,X-ray diffraction (XRD),fourier transform infrared spectroscopy (FT-IR),scanning electron microscope (SEM),transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS).The results show that the catalysts calcined at 500℃ have large specific surface area,the highest Cu species dispersion,uniform Cu particle size,and the highest content of copper phyllosilicate in the precursor,resulting in the highest content of Cu⁺ after reduction.The conversion of dimethyl oxalate is 98.5% and the selectivity of methyl glycolate is 52.1% when this catalyst is applied to the selective hydrogenation of dimethyl oxalate to methyl glycolate under the conditions of 2 MPa,200℃ and H₂/DMO=100.The catalyst exhibits an excellent stability.

王征(1997-),女,硕士研究生,研究方向为碳一化工,2472662796@qq.com