In the selective hydrogenation of furfural (FAL) to furfuryl alcohol (FOL), it is important to develop a simple and cheap non-precious metal catalyst to replace the precious metal catalyst. Therefore, Cu_xMg₃AlO_y (x = 0.3, 0.5, 0.7, 0.9, 1.1) composite metal oxide catalysts were prepared by CuMgAl-LDHs as precursor for the selective hydrogenation of FAL to FOL. In this series of catalysts, Cu_0.9Mg₃AlO_y has the best catalytic activity, with 99% FAL conversion and 98.4% selectivity under the mild reaction conditions of 1.6 MPa H₂ pressure, 1.5 h and 120 ℃, and good reusability. XRD, TEM, H₂-TPR, CO₂-TPD, XPS and in-situ DRIFTS characterization were used to investigate the activate species for hydrogenation reaction. It can be proved that Cu²⁺ and Cu⁺ on the surface of Cu_xMg₃AlO_y can be partially reduced to the Cu⁰ species in-situ during the reaction, promoting the hydrogenation of FAL. Various studies confirm that Cu⁰ is mainly responsible for the activation and dissociation of H₂, and both Cu⁰ and Cu⁺ are used to adsorb the carbonyl group in FAL to improve the selectivity of FOL. Moreover, the appropriate amount of the Cu⁰ and Cu⁺ species plays an important role in selective hydrogenation of FAL to FOL through their synergy.

在糠醛（FAL）选择性加氢制糠醇（FOL）过程中，开发一种简单、廉价的非贵金属催化剂来替代贵金属催化剂具有重要意义。因此，以CuMgAl-LDHs为前驱体制备了Cu _x Mg ₃ AlO _y (x = 0.3,0.5,0.7,0.9,1.1)复合金属氧化物催化剂，用于FAL选择性加氢制备FOL。该系列催化剂中，Cu _0.9 Mg ₃ AlO _y催化活性最好，在1.6 MPa H ₂压力、1.5 h、120 ℃的温和反应条件下，FAL转化率为99%，选择性为98.4%，且重复使用性良好。XRD、TEM、H ₂ -TPR、CO ₂-TPD、XPS 和原位 DRIFTS 表征用于研究氢化反应的活化物质。证明Cu _x Mg ₃ AlO _y表面的Cu ²⁺和Cu ⁺在反应过程中可以部分原位还原为Cu ^{0物种，促进FAL的加氢。}各种研究证实Cu ⁰主要负责H ₂的活化和解离，Cu ⁰和Cu ⁺均用于吸附FAL中的羰基以提高FOL的选择性。另外，适量的Cu ⁰和Cu ⁺物种通过它们的协同作用在 FAL 选择性氢化为 FOL 中发挥着重要作用。