This research investigates the role of surface acidity and basicity in influencing the catalytic performance of nickel-supported catalysts for the selective hydrogenation of isobutyraldehyde (IBD) to isobutanol (IBA), an important industrial process for producing additives for pharmaceuticals and fuels. Nickel-based catalysts such as 60Ni/Al₂O₃, 60Ni/MgAlO, and 60Ni/MgO were synthesized, characterized, and evaluated for their catalytic activity and selectivity. The study employed microcalorimetric adsorption and Fourier-transform infrared spectroscopy (FTIR) to elucidate the interactions of IBD and IBA with the catalyst surfaces, providing insights into the effects of these interactions on catalytic behavior. The 60Ni/MgAlO catalyst demonstrated the higher activity and selectivity for IBA production, attributed to its optimal balance of surface acidity and basicity and a high density of active Ni sites. In contrast, 60Ni/Al₂O₃, despite its high intrinsic activity, showed lower selectivity due to side reactions at lower conversion. 60Ni/MgO exhibited limited activity, with a significant amount of IBD unconverted, leading to higher byproduct formation. These findings highlight the critical influence of surface properties on the hydrogenation process and underscore the potential for tailoring catalyst composition and surface characteristics to enhance selectivity and efficiency in industrial applications.

中文翻译：

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通过杂化酸/碱载体调节表面酸度/碱度，用于选择性加氢异丁醛


本研究探讨了表面酸度和碱度在影响镍负载催化剂催化性能中的作用，用于异丁醛 （IBD） 选择性加氢为异丁醇 （IBA），这是生产药物和燃料添加剂的重要工业过程。合成、表征和评价了 60Ni/Al₂O₃、60Ni/MgAlO 和 60Ni/MgO 等镍基催化剂的催化活性和选择性。该研究采用微量热吸附和傅里叶变换红外光谱 （FTIR） 来阐明 IBD 和 IBA 与催化剂表面的相互作用，从而深入了解这些相互作用对催化行为的影响。60Ni/MgAlO 催化剂表现出更高的 IBA 生产活性和选择性，这归因于其表面酸度和碱度的最佳平衡以及活性 Ni 位点的高密度。相比之下，60Ni/Al₂O₃ 尽管具有较高的内在活性，但由于转化率较低的副反应而显示出较低的选择性。60Ni/MgO 表现出有限的活性，大量 IBD 未转化，导致更高的副产物形成。这些发现强调了表面特性对加氢过程的关键影响，并强调了定制催化剂组成和表面特性以提高工业应用中选择性和效率的潜力。