Abstract Different phase structured MnO2, including β-, α-, γ- and three kinds of δ-MnO2, are prepared and their catalytic activities are compared through catalytic oxidation of toluene at different temperature. The as-prepared MnO2 are characterized by X-ray diffraction and scanning electron microscope. Toluene conversion results show that catalytic oxidation activity follows the sequence of β-

中文翻译：

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MnO2相结构和δ-MnO2形貌对甲苯催化氧化的影响

摘要 制备了不同相结构的MnO2，包括β-、α-、γ-和三种δ-MnO2，并通过甲苯在不同温度下的催化氧化来比较它们的催化活性。所制备的 MnO2 通过 X 射线衍射和扫描电子显微镜进行表征。甲苯转化结果表明催化氧化活性遵循β-