Reduced graphene oxide aerogel (rGOae) was synthesized via hydrothermal reduction and following freeze-drying method. The as-prepared material was then used as a novel support of Cu-Zn/rGOae catalyst for the direct CO₂ hydrogenation to methanol. Moreover, in situ X-ray absorption near-edge structure (XANES) spectroscopy was applied to evaluate the oxidation state of the Cu and Zn species during the H₂ reduction process at 350 °C with a holding time of 90 min. The effects of the hydrothermal reduction temperature of rGOae support and Cu-Zn metal loading contents were investigated. Interestingly, the hydrothermal reduction at 140 °C provided the highest surface area (458 m² g⁻¹), and 15wt%Cu-Zn/rGOae catalyst achieved the highest methanol production (94.53 mg_MeOH g_cat⁻¹ h⁻¹) at a reaction temperature of 250 °C and pressure of 15 bar.

通过水热还原和冷冻干燥法合成还原的氧化石墨烯气凝胶（rGOae）。然后将所制备的材料用作Cu-Zn / rGOae催化剂的新型载体，用于将CO ₂直接加氢为甲醇。此外，使用原位X射线吸收近边缘结构（XANES）光谱来评估H ₂还原过程中在350°C下保持90分钟的过程中Cu和Zn物种的氧化态。研究了rGOae载体的水热还原温度和Cu-Zn金属负载量的影响。有趣的是，在140°C的水热还原提供了最大的表面积（458 m ²  g ^-1）和15wt％Cu-Zn / rGOae催化剂在250°C的反应温度和15 bar的压力下获得最高的甲醇产量（94.53 mg _MeOH  g _cat ^-1  h ^-1）。