The catalytic hydrogenation of CO₂ to methanol has been regarded as the one of the most economical and effective ways to reduce CO₂ emissions. It can also provide a feasible idea for solving the energy crisis. In this paper, a series of Pd/In₂O₃/SBA-15 catalysts were prepared by the citric acid method. The DFT simulation and catalyst characterization including the N₂ adsorption, XRD, H₂-TPR, TEM, XPS and CO₂-TPD were applied. The results showed that the as-prepared Pd/In₂O₃/SBA-15 catalysts exhibited superior catalytic activity with 83.9% methanol selectivity and 12.6% CO₂ conversion, corresponding to a STY of 1.1 × 10^-2 mol·h^-1·g_cat^-1 under reaction conditions of 260 °C, 5 Mpa and 15,000 cm³ h^-1·g_cat^-1. It is suggested that the synergetic effect of H₂ dissociation on Pd species and CO₂ activation on In₂O₃ promoted the high efficiency conversion of CO₂ to methanol.

将CO ₂催化加氢成甲醇已被认为是减少CO ₂排放的最经济，最有效的方法之一。它也可以为解决能源危机提供可行的思路。本文采用柠檬酸法制备了一系列Pd / In ₂ O ₃ / SBA-15催化剂。进行了DFT模拟和催化剂表征，包括N ₂吸附，XRD，H ₂ -TPR，TEM，XPS和CO ₂ -TPD。结果表明，所制备的Pd / In ₂ O ₃ / SBA-15催化剂具有优异的催化活性，甲醇选择性为83.9％，CO _2为126.6％。转换，对应于1.1×10的STY ^-2摩尔·H ^-1 ·克_猫^-1的260℃，5MPa下以及15000厘米反应条件下³  ħ ^-1 ·克_猫^-1。研究表明，H ₂分解对Pd的协同作用以及CO ₂对In ₂ O _3的活化共同促进了CO ₂向甲醇的高效转化。