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Synthesis of highly efficient Mn2O3 catalysts for CO oxidation derived from Mn-MIL-100

机译：由Mn-MIL-100合成的高效Mn2O3用于CO氧化的催化剂

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摘要

In this work, metal-organic frameworks (MOFs) Mn-MIL-100 were first prepared, which were next used as templates to obtain the irregular porous Mn2O3 cubes through calcination with air at different temperature. The catalysts were characterized by N-2 adsorption-desorption, X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), H-2-temperature program reduction (H-2-TPR) and X-ray photoelectron spectroscopic (XPS). The catalytic activity for CO oxidation over Mn2O3 catalysts was investigated. It was found that calcination temperature had a strong effect on the structure and catalytic activity of Mn2O3 catalyst. Mn2O3 catalyst obtained by calcined at 700 degrees C (Mn(2)O(3)700) showed a smaller specific surface area, but displayed a high catalytic activity and excellent stability with a complete CO conversion temperature (Tea) of 240 degrees C, which was attributed to the unique structure, a high quantity of surface active oxygen species, smaller particle size, oxygen vacancies and good low temperature reduction behavior. The effect of water vapor on catalytic activity was also examined. The introduction of water vapor to the feedstock induced a positive effect on CO oxidation over Mn2O3-700 catalyst. Furthermore, no obvious drop is observed in activity over catalysts even in the presence of water vapor during 48 h. (C) 2017 Elsevier B.V. All rights reserved.
机译：在这项工作中，首先准备了金属有机骨架（MOF）Mn-MIL-100，然后将其用作模板，通过在不同温度下用空气煅烧获得不规则的多孔Mn2O3立方体。通过N-2吸附-脱附，X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），H-2-温度程序还原（H-2-TPR）和X对催化剂进行了表征。射线光电子能谱（XPS）。研究了Mn2O3催化剂对CO氧化的催化活性。发现煅烧温度对Mn2O3催化剂的结构和催化活性有很大的影响。通过在700摄氏度下煅烧（Mn（2）O（3）700）获得的Mn2O3催化剂显示出较小的比表面积，但在240摄氏度的完全CO转化温度（Tea）下显示出高的催化活性和出色的稳定性，这归因于其独特的结构，大量的表面活性氧，较小的粒径，氧空位和良好的低温还原性能。还检查了水蒸气对催化活性的影响。将水蒸气引入到原料中对Mn2O3-700催化剂上的CO氧化产生积极影响。此外，即使在48小时内存在水蒸气的情况下，与催化剂相比，活性也没有明显下降。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2017年第31期|27-33|共7页
  • 作者

    Zhang Xiaodong; Li Hongxin; Hou Fulin; Yang Yang; Dong Han; Liu Ning; Wang Yuxin; Cui Lifeng;

  • 作者单位

    Univ Shanghai Sci & Technol, Environm & Low Carbon Res Ctr, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

    Univ Shanghai Sci & Technol, Environm & Low Carbon Res Ctr, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

    Univ Shanghai Sci & Technol, Environm & Low Carbon Res Ctr, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

    Univ Shanghai Sci & Technol, Environm & Low Carbon Res Ctr, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

    Univ Shanghai Sci & Technol, Environm & Low Carbon Res Ctr, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

    Univ Shanghai Sci & Technol, Environm & Low Carbon Res Ctr, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

    Taizhou Vocat & Tech Coll, Inst Appl Biotechnol, Taizhou 318000, Zhejiang, Peoples R China;

    Univ Shanghai Sci & Technol, Environm & Low Carbon Res Ctr, Sch Environm & Architecture, Shanghai 200093, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mn-MIL-100; Mn2O3; Low temperature reduction; CO oxidation;

    机译：Mn-MIL-100;Mn2O3;低温还原;CO氧化;

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