Research Initiation Award: Influence of Microporosity and Surface Basicity on the Reactivity of Novel Aromatization Catalysts

考察了载体表面碱度和微孔率对氧化镁催化剂上正己烷/铂转化反应的影响。碱性分子筛孔道中的铂团簇催化正己烷芳构化反应具有很高的活性和选择性，最近发现非沸石碱性氧化物上的铂团簇具有类似的活性和选择性，这对通常的解释提出了质疑。在这项研究中，氧化物的组成被系统地改变，以可预测和可测量的方式改变微孔率和表面碱度。使用反应性测量来确定这些结构和化学变量对铂催化芳构化选择性的重要性。这项工作试图重新定义导致观察到的高选择性的因素。很明显，这种方法的范围应该比之前想象的更广，但范围的限制是未知的。在化学品和燃料加工中的应用很多。

The effects of surface basicity and microporosity of the support on the conversion of n-hexane over platinum on magnesia catalysts is examined. Platinum clusters inside the channels of basic zeolites catalyze the aromatization of n- hexane with high activity and selectivity; recently it has been discovered that platinum clusters on a nonzeolitic basic oxide possess similar activity and selectivity, throwing into question the usual explanations for this property. In this study, the composition of the oxide is varied systematically to change both the microporosity and the surface basicity in predictable and measurable ways. Reactivity measurements are used to determine the importance of these structural and chemical variables on the selectivity of platinum-catalyzed aromatization. This work attempts to redefine the factors responsible for the high selectivity observed. It is already clear that this approach should have a broader scope than thought previously, but the limits of the scope are unknown. Applications in processing of chemicals and fuels are numerous.