Three Mn2O3 with different morphologies and particle sizes were synthesized using MnBDC as precursor. Interestingly, the morphology and size of MnBDC can be easily regulated by changing the reaction solvents slightly. The Mn2O3-L catalyst with large layers and small crystal size exhibited the best catalytic activity for complete oxidation of propane, with T50 of 266℃ and T90 of 311℃ at the WHSV of 120 L g−1 h−1. The multi-layered structure and small crystal size of Mn2O3-L allowed it to possess a high surface area and more interfacial oxygen defects that facilitated oxygen mobility, improving the catalytic activity. It seems that the large precursor size of MnBDC-L slowed down the decomposition rate of ligands, promoting the formation of large layered structure and small crystal size of Mn2O3-L. This study offers a simple strategy to control the structure and crystal size of Mn2O3 catalysts.

中文翻译：

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MnBDC 衍生的 Mn2O3 催化剂的形貌和尺寸调控增强丙烷完全氧化


以 MnBDC 为前驱体合成了 3 种不同形貌和粒径的 Mn2O3。有趣的是，通过稍微改变反应溶剂，可以很容易地调节 MnBDC 的形态和大小。大层、小晶体尺寸的 Mn2O3-L 催化剂表现出丙烷完全氧化的最佳催化活性，在 120 L g-1 h-1 的 WHSV 下，T50 为 266°C，T90 为 311°C。Mn2O3-L 的多层结构和小晶体尺寸使其具有较高的表面积和更多的界面氧缺陷，从而促进了氧的迁移，提高了催化活性。MnBDC-L 的大前驱体尺寸似乎减慢了配体的分解速度，促进了 Mn2O3-L 的大层状结构和小晶体尺寸的形成。本研究提供了一种控制 Mn2O3 催化剂结构和晶体尺寸的简单策略。