The synthesis and characterization of an inexpensive porous Mo_xC_y/SiO₂ material is presented, which was obtained by mixing ammonium hexamolybdate, sucrose, and a mesoporous silica (SBA-15), with a subsequent heat treatment under inert atmosphere. This porous material presented a specific surface area of 170 m²/g. The catalytic behavior in CO₂ hydrogenation was compared with that of Mo₂C and α-MoC_1−x obtained from ammonium hexamolybdate and sucrose, using different Mo/C ratios. CO₂ hydrogenation tests were performed at moderate (100 kPa) and high pressures (2.0 MPa), and it was found that only CO, H₂O and CH₄ are formed at moderate pressures by the three materials, while at higher pressures, methanol and hydrocarbons (C₂H₆, C₃H₈) are also obtained. Differences in selectivity were observed at the high pressure tests. Mo₂C presented higher selectivity to CO and methanol compared with MoC_1−x, which showed preferential selectivity to hydrocarbons (CH₄, C₂H₆). The porous Mo_xC_y/SiO₂ material showed the highest CO₂ hydrogenation activity at high temperatures (270 and 300 °C), being a promising material for the conversion of CO₂ to CO and CH₄.

提出了廉价的多孔Mo _x C _y / SiO ₂材料的合成和表征，该材料是通过将六钼酸铵，蔗糖和中孔二氧化硅（SBA-15）混合，随后在惰性气氛下进行热处理而获得的。该多孔材料的比表面积为170m ² / g。使用不同的Mo / C比，将CO ₂加氢中的催化行为与从六钼酸铵和蔗糖中获得的Mo ₂ C和α-MoC1 _-x进行了比较。在中压（100 kPa）和高压（2.0 MPa）下进行了CO ₂加氢测试，发现只有CO，H ₂O和CH ₄是由三种材料在中等压力下形成的，而在较高压力下，还会获得甲醇和碳氢化合物（C ₂ H ₆，C ₃ H ₈）。在高压测试中观察到选择性差异。与MoC _1-x相比，Mo ₂ C对CO和甲醇的选择性更高，而对烃（CH ₄，C ₂ H ₆）的选择性更高。多孔Mo _x C _y / SiO ₂材料显示出最高的CO ₂高温（270和300°C）下的氢化活性是将CO ₂转化为CO和CH ₄的有前途的材料。