Indium-based oxides are potential for CO₂ hydrogenation to methanol. However, upon complexing with SAPO-34, they give a C₂⁼ – C₄⁼ yield below 7.3% due to production of large amounts of CO and CH₄ at high CO₂ conversion. Therefore, a large improvement of the C₂⁼ – C₄⁼ yield over indium-based oxide and zeolite composite is a challenge. In this context, InCeO_x and InCrO_x oxides are prepared here and found to produce more methanol than In₂O₃ or In-Zr oxide. Experimental and DFT calculation results reveal that incorporation of Ce or Cr into In₂O₃ generates more surface oxygen vacancies and enhances the electronic interaction between HCOO* intermediates and catalyst surface, which decreases HCOO* and CH₃OH formation free energy barriers and enthalpy barriers. Compared to InCeO_x(0.13) and In₂O₃, InCrO_x(0.13) shows higher catalytic activity for CO₂ hydrogenation, and by coupling with SAPO-34, it gives a C₂⁼ – C₄⁼ yield of 1.5 – 2.0 times of those obtained on In₂O₃/SAPO-34 and In-Zr/SAPO-34 at CO₂ conversion of 33.6%.

铟基氧化物有可能将CO ₂加氢为甲醇。但是，与SAPO-34络合后，由于在高CO ₂转化率下产生大量CO和CH ₄，它们的C ₂ ⁼ – C ₄ ⁼收率低于7.3％。因此，与铟基氧化物和沸石复合材料相比，C ₂ ⁼ – C ₄ ⁼产率的大幅提高是一个挑战。在这种情况下，此处制备了InCeO _x和InCrO _x氧化物，发现它们比In ₂ O ₃产生更多的甲醇。或In-Zr氧化物。实验和DFT计算结果表明，将Ce或Cr掺入In ₂ O _3中会产生更多的表面氧空位，并增强HCOO *中间体与催化剂表面之间的电子相互作用，从而降低HCOO *和CH ₃ OH形成的自由能垒和焓垒。 。与InCeO _x（0.13）和In ₂ O _3相比，InCrO _x（0.13）显示出更高的CO ₂加氢催化活性，并且通过与SAPO-34偶联，得到的C ₂ ⁼ – C ₄ ⁼收率1.5 – 2.0 In ₂ O上获得的那些的时间₃ / SAPO-34和In-Zr / SAPO-34在CO ₂转化率为33.6％的情况下。