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首页> 外文期刊>RSC Advances >Ultrafine NiMoOx nanoparticles confined in mesoporous carbon for the reduction of nitroarenes: effect of the composition and accessibility of the active sites
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Ultrafine NiMoOx nanoparticles confined in mesoporous carbon for the reduction of nitroarenes: effect of the composition and accessibility of the active sites

机译：超细Nimoox纳米颗粒限制在中孔碳中，用于减少硝基甲烷：组合物的作用和活性位点的可及性

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摘要

The design of ultrafine NiMoOx nanoparticles (NPs) confined in hierarchically porous carbon remains a great challenge due to its high calcination temperature. In addition, the composition of active sites of NiMoOx NPs for the hydrogenation reaction is still ambiguous. Herein, we report a general approach for the synthesis of ultrafine NiMoOx NPs confined in mesoporous carbon with different morphologies and compositions using the replication method with SBA-15 as a hard template. The pore structure of mesoporous carbon and the Ni/Mo composition valence-state were discovered to be the main factors in the reduction of nitroarenes. The NiMoOx/mesoporous carbon-platelet (NiMoOx/MC-PL) with short mesochannels (similar to 350 nm) and high surface area (similar to 995 m(2) g(-1)) possessed excellent catalytic activity towards the reduction of 4-nitrophenol, whereas NiMoOx/mesoporous carbon-hexagonal-prism (NiMoOx/MC-HP), NiMoOx/mesoporous carbon-long-rod (NiMoOx/MC-LR), and NiMoOx/mesoporous carbon-spherical (NiMoOx/MC-SP) with long mesochannels and relatively less surface area exhibited poor catalytic performance. The bifunctional mechanism or electronic synergistic effects of Ni and Mo species enhanced their catalytic performance. A good balance between MoOx and metallic Ni (NiMoOx/MC-PL-450) was found to be suitable for the reduction of 4-NP.
机译：由于其高煅烧温度，超细镍碳纳米粒子（NPS）局限于分层多孔碳的纳米粒子（NPS）的设计仍然是一个很大的挑战。此外，氢化反应的Nimoox NPS的活性位点的组成仍然模糊。在此，我们报告了一种通过使用与SBA-15的复制方法合成在中孔碳中限制在介孔碳中的超细镍氢NP的一般方法，作为硬模板。发现介孔碳的孔结构和Ni / Mo组合物价值 - 状态是硝基拉酮还原的主要因素。具有短Mesochinnels（类似于350nm）和高表面积（类似于995米（2 )g（-1））的Nimoox /介孔/ MC-PL）具有优异的催化活性，朝向减少4 - 硝基苯酚，而Nimoox /介孔碳 - 六边形 - 棱柱（Nimoox / MC-HP），Nimoox /介孔碳 - 长杆（Nimoox / MC-LR）和Nimoox /介孔碳球形（Nimoox / MC-SP）长Mesochannels和相对较少的表面积表现出较差的催化性能。 Ni和Mo物种的双功能机制或电子协同作用增强了它们的催化性能。发现MOOX和金属Ni（Nimoox / MC-PL-450）之间的良好平衡适用于减少4-NP。

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  • 来源
    《RSC Advances》 |2019年第8期|共12页
  • 作者

    Li Shuna; Lv Yipin; Song Guolong; Li Cuncheng; Gao Daowei; Chen Guozhu;

  • 作者单位

    Univ Jinan Sch Chem &

    Chem Engn Jinan 250022 Shandong Peoples R China;

    Univ Jinan Sch Chem &

    Chem Engn Jinan 250022 Shandong Peoples R China;

    Univ Jinan Sch Chem &

    Chem Engn Jinan 250022 Shandong Peoples R China;

    Univ Jinan Sch Chem &

    Chem Engn Jinan 250022 Shandong Peoples R China;

    Univ Jinan Sch Chem &

    Chem Engn Jinan 250022 Shandong Peoples R China;

    Univ Jinan Sch Chem &

    Chem Engn Jinan 250022 Shandong Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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