Selective hydrogenation of fatty esters to high-value fatty alcohols is highly desirable for the utilization of natural oils. However, the hydration reaction of the support and hydrolysis reaction of the C–O bond can affect the selectivity of the targeted alcohol. Herein, core–shell Al₂O₃@Cu₂Zn₁-LDO is prepared via the in situ growth of CuZnAl-LDHs on Al₂O₃ microsphere substrates, followed by a calcination–reduction process. The catalyst achieves a methyl laurate (ML) conversion of 95% and selectivity of 98% for lauryl alcohol (LA) under mild conditions (4 MPa of H₂ and 240 °C). In addition, the three-dimensional (3D) hierarchical structure of the Al₂O₃@Cu₂Zn₁-LDO catalyst enhances mass diffusion and transport, significantly improving catalytic performance and exhibiting excellent stability in the hydrogenation of fatty esters to fatty alcohols. The hydration reaction between Al₂O₃ and H₂O produced during the hydrogenation of fatty acid esters is prevented successfully. Therefore, this work provides a new approach for designing newly structured Cu-based catalysts for the highly selective synthesis of fatty alcohols from natural oils.

中文翻译：

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Al2O3@CuZn核壳催化剂上酯加氢脱氧制醇的活性位点和构效关系的识别


脂肪酯选择性氢化为高价值脂肪醇对于天然油的利用是非常理想的。然而，载体的水合反应和C-O键的水解反应会影响目标醇的选择性。在此，核壳Al ₂ O ₃ @Cu ₂ Zn ₁ -LDO是通过CuZnAl-的原位生长制备的。 Al ₂ O ₃ 微球基底上的 LDH，然后进行煅烧还原过程。该催化剂在温和条件下（4 MPa H ₂ 、240℃），月桂酸甲酯（ML）转化率达到95%，月桂醇（LA）选择性达到98%。此外，Al ₂ O ₃ @Cu ₂ Zn ₁ -LDO 催化剂的三维（3D）分级结构增强质量扩散和传输，显着提高催化性能，并在脂肪酯氢化成脂肪醇的过程中表现出优异的稳定性。成功阻止了脂肪酸酯加氢过程中产生的Al ₂ O ₃ 与H ₂ O之间的水合反应。因此，这项工作为设计新型结构的铜基催化剂提供了一种新方法，用于从天然油中高选择性合成脂肪醇。