Alumina (Al₂O₃) is a widely used material for catalysis in the chemical industry. Besides a high specific surface area, acid sites on Al₂O₃ play a crucial role in the chemical transformation of adsorbed molecules, which ultimately react and desorb from the catalyst. This study introduces a synthetic method based on electrospinning to produce Al₂O₃ nanofibers (ANFs) with acidity and porosity tuned using different aluminum precursor formulations. After electrospinning and heat treatment, the nanofibers form a non-woven network with macropores (∼4 μm). Nanofibers produced from aluminum di(sec-butoxide)acetoacetic ester chelate (ASB) show the highest total acidity of ca. 0.70 µmol/m² determined with temperature-programmed desorption of ammonia (NH₃-TPD) and BET. The nature of the acid site in ASB ANFs is studied in detail with infrared (IR) spectroscopy. Pyridine is used as a molecular probe for the identification of acid sites in ASB. Pyridine showed the presence of Lewis acid sites prominently. Density-functional theory (DFT) is conducted to understand the desorption kinetics of the adsorbed chemical species, such as ammonia (NH₃) on crystalline γ-Al₂O₃. For our analysis, we focused on a mobile approach for chemisorbed and physisorbed NH₃. The computational results are compared with NH₃-TPD experiments, ultimately utilized to estimate the desorption energy and kinetic desorption parameters. The experiments are found to pair up with our simulation results. We predict that these non-woven structures will find application as a dispersion medium of metallic particles in catalysis.

氧化铝（Al ₂ O ₃）是化学工业中广泛使用的催化材料。除了高比表面积外，Al ₂ O ₃上的酸性位点在吸附分子的化学转化中起着至关重要的作用，最终反应和从催化剂上解吸。本研究介绍了一种基于静电纺丝的合成方法，以生产具有使用不同铝前驱体配方调整的酸度和孔隙率的Al ₂ O ₃纳米纤维 (ANF)。静电纺丝和热处理后，纳米纤维形成具有大孔（~4 μm）的非织造网络。由二（仲丁醇）乙酰乙酸酯螯合物 (ASB) 制成的纳米纤维显示出最高的总酸度，约为 0.70 微摩尔/米²通过程序升温解吸氨 (NH ₃ -TPD) 和 BET测定。使用红外 (IR) 光谱详细研究了 ASB ANF 中酸性位点的性质。吡啶用作鉴定 ASB 中酸性位点的分子探针。吡啶显着地显示出路易斯酸位点的存在。进行密度泛函理论 (DFT) 以了解吸附的化学物质的解吸动力学，例如结晶 γ-Al ₂ O ₃上的氨 (NH ₃ ) 。对于我们的分析，我们专注于化学吸附和物理吸附 NH ₃的移动方法。计算结果与NH ₃比较-TPD 实验，最终用于估计解吸能量和动力学解吸参数。发现这些实验与我们的模拟结果相符。我们预测这些非织造结构将在催化中用作金属颗粒的分散介质。