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首页> 外文期刊>RSC Advances >Preparation of platinum nanoparticles immobilized on ordered mesoporous Co3O4-CeO2 composites and their enhanced catalytic activity
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Preparation of platinum nanoparticles immobilized on ordered mesoporous Co3O4-CeO2 composites and their enhanced catalytic activity

机译：固定在有序介孔CO3O4-CEO2复合材料上固定的铂纳米粒子的制备及其增强催化活性

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摘要

Using mesoporous silica KIT-6 as a template, ordered mesoporous Co3O4-CeO2 composites with different contents of cobalt were prepared via the hard template method. Uniform Pt nanoparticles stabilized by polyamidoamine (PAMAM) dendrimers were immobilized on different Co3O4-CeO2 composites, resulting in Pt-based supported catalysts. The prepared materials were characterized by several techniques such as transmission electron microscopy (TEM), nitrogen physical adsorption, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and energy dispersion X-ray analysis (EDX). The results showed that the Co3O4-CeO2 composites have a regular pore structure and high crystallinity. Moreover, the specific surface area of Co3O4-CeO2 reached 135.04 m(2) g(-1) for 10 mol% of cobalt (Co/(Co + Ce)). The introduction of cobalt could improve the structure of the supports and enhance the catalytic efficiency for the prepared Pt-based supported catalysts. The catalytic performances were evaluated by the reduction of 4-nitrophenol as monitored by UV-Vis spectra. In a comparison of the catalysts with different cobalt contents, it was found that Pt/meso-CeO2Co10 possessed the highest catalytic performance as well as good reusability.
机译：使用介孔二氧化硅试剂盒-6作为模板，通过硬模板法制备具有不同钴含量的有序的介孔CO3O4-CeO2复合材料。通过聚酰胺胺（PAMAM）树枝状聚合物稳定的均匀Pt纳米颗粒固定在不同的CO 3 O 4-CeO 2复合材料上，得到PT基负载的催化剂。制备的材料的特征在于透射电子显微镜（TEM），氮气物理吸附，扫描电子显微镜（SEM），X射线光电子体谱（XPS），X射线衍射（XRD）和能量分散X射线等技术分析（EDX）。结果表明，CO3O4-CEO2复合材料具有常规孔结构和高结晶度。此外，Co3O4-CeO 2的比表面积达到135.04m（2）g（-1），10摩尔％的钴（Co /（Co + Ce））。钴的引入可以改善载体的结构，增强制备的Pt基负载催化剂的催化效率。通过UV-Vis光谱监测的4-硝基苯酚的还原催化性能。在具有不同钴含量的催化剂的比较中，发现Pt / Meso-CeO 2CO10具有最高的催化性能以及良好的可重用性。

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  • 来源
    《RSC Advances》 |2016年第71期|共11页
  • 作者

    Wang Qianli; Zhang Yiwei; Zhou Yuming; Zhang Zewu; Xu Yuanmei; Zhang Chao; Zhang Hongxing; Sheng Xiaoli;

  • 作者单位

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Nanjing Inst Technol Sch Mat Engn Nanjing 211167 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Chem &

    Chem Engn Nanjing 211189 Jiangsu Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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