Abstract Morphologically controlled synthesis and Fe doping of Mn3O4 hexagonal plates (Mn3O4-HP) with the basal (1 1 2) facet was accomplished in one-step to obtain the Fe-substituted FexMn3−xO4-HP on which the Pd(Ox) nanoparticles of ca. 4 nm (1 wt% Pd-basis) was loaded. The materials were used as the model catalysts for combustion of VOC (methyl acetate). These model catalysts exhibit high performances: Fe0.135Mn2.865O4-HP is as comparably active as Pd/Mn3O4-HP; and Pd/Fe0.135Mn2.865O4 gives the lowest T100 of 200 °C. The controlled Fe doping does not change the phase structure and basic morphology of Mn3O4-HP whereas enhances the exposure of the basal (1 1 2) plane. Fe doping increases the oxidation state of the Pd entity which in turn favors the formation of highly active oxygen species in greater amount. The measured Ea values also reflect the impact of Fe doping and Pd loading on the inherent potential of catalysts.

中文翻译：

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形态均匀的 Pd/FexMn3-xO4-HP 界面作为挥发性有机化合物催化燃烧的高性能模型催化剂

摘要 一步完成具有基底 (1 1 2) 面的 Mn3O4 六边形板 (Mn3O4-HP) 的形态控制合成和 Fe 掺杂，以获得 Fe 取代的 FexMn3−xO4-HP，Pd(Ox) 纳米颗粒在其上约 加载了 4 nm（1 wt% Pd 基）。该材料用作燃烧VOC（乙酸甲酯）的模型催化剂。这些模型催化剂表现出高性能：Fe0.135Mn2.865O4-HP 的活性与 Pd/Mn3O4-HP 相当；而 Pd/Fe0.135Mn2.865O4 的 T100 最低，为 200 °C。受控的 Fe 掺杂不会改变 Mn3O4-HP 的相结构和基本形态，但会增强基 (1 1 2) 面的暴露。Fe 掺杂增加了 Pd 实体的氧化态，这反过来有利于形成更大量的高活性氧物质。