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Pd-Fe dual-metal nanoparticles confined in the interface of carbon nanotubes/N-doped carbon for excellent catalytic performance

机译：Pd-Fe双金属纳米颗粒被限制在碳纳米管/ N掺杂碳的界面中，具有出色的催化性能

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摘要

Efficient catalyst with enhanced activity and high stability is important for chemical industry. Active species, support as well as their interaction play key roles on catalytic performance for supported heterogeneous catalysts. In this work, Pd-Fe dual-metal nanoparticles (NPs) were anchored and confined in an interface of double-layered carbon nanotubesitrogen-doped carbon (CNT/NC) support to obtain a dual-metal CNT/PdFe/NC catalyst. The microstructure and composition of CNT/PdFe/NC catalyst were systematically characterized by transmission electron microscopy (TEM), X-ray photoelectron spectrometry (XPS), inductively coupled plasma mass spectrometry (ICP-MS), X-ray diffraction (XRD) and surface area analysis. Benefiting from the catalytically active tubular CNT/NC support, uniformly dispersed Pd-Fe dual-metal NPs and unique confined structure, the CNT/PdFe/NC catalyst exhibited excellent catalytic activity for nitroarenes reduction reaction. The catalytic activity of the Pd-Fe dual-metal NPs was much better than that of monometal counterparts (CNT/Pd/NC and CNT/Fe/NC), showing an enhanced synergetic effect. The catalytic turnover frequency (TOF) of the CNT/PdFe/NC catalyst amounted to 70.36 min(-1) toward 4-nitrophenol (4-NP) reduction reaction, being superior to previously reported noblemetal-based catalysts. Furthermore, this catalyst also exhibited an excellent stability and reusability due to the intrinsic confined structure. This work provides valuable insights to rationally design and develop an efficient dual-metal catalyst.
机译：具有增强的活性和高稳定性的高效催化剂对化学工业很重要。活性物种，载体及其相互作用对负载型多相催化剂的催化性能起关键作用。在这项工作中，将Pd-Fe双金属纳米粒子（NPs）锚定并限制在双层碳纳米管/掺氮碳（CNT / NC）载体的界面中，以获得双金属CNT / PdFe / NC催化剂。通过透射电子显微镜（TEM），X射线光电子能谱（XPS），电感耦合等离子体质谱（ICP-MS），X射线衍射（XRD）和透射电子显微镜（TEM）对CNT / PdFe / NC催化剂的微观结构和组成进行了系统表征。表面积分析。得益于具有催化活性的管状CNT / NC载体，均匀分散的Pd-Fe双金属NPs和独特的受限结构，CNT / PdFe / NC催化剂对硝基芳烃的还原反应表现出出色的催化活性。 Pd-Fe双金属NPs的催化活性比单金属NPs（CNT / Pd / NC和CNT / Fe / NC）的催化活性要好得多，显示出增强的协同作用。 CNT / PdFe / NC催化剂对4-硝基苯酚（4-NP）还原反应的催化周转频率（TOF）总计为70.36 min（-1），优于以前报道的基于贵金属的催化剂。此外，由于其固有的封闭结构，该催化剂还显示出优异的稳定性和可重复使用性。这项工作为合理设计和开发有效的双金属催化剂提供了宝贵的见识。

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  • 来源
    《Applied Surface Science》 |2019年第30期|477-484|共8页
  • 作者

    Wang Deng; Liu Jin; Xi Jiangbo; Jiang Jizhou; Bai Zhengwu;

  • 作者单位

    Wuhan Inst Technol, Sch Chem & Environm Engn, Sch Environm Ecol & Biol Engn, Wuhan 430073, Hubei, Peoples R China;

    Wuhan Inst Technol, Sch Chem & Environm Engn, Sch Environm Ecol & Biol Engn, Wuhan 430073, Hubei, Peoples R China;

    Wuhan Inst Technol, Sch Chem & Environm Engn, Sch Environm Ecol & Biol Engn, Wuhan 430073, Hubei, Peoples R China;

    Wuhan Inst Technol, Sch Chem & Environm Engn, Sch Environm Ecol & Biol Engn, Wuhan 430073, Hubei, Peoples R China|Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China;

    Wuhan Inst Technol, Sch Chem & Environm Engn, Sch Environm Ecol & Biol Engn, Wuhan 430073, Hubei, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Dual-metal; Confined interface; Carbon nanotube; N-doped carbon; Nitroarene reduction;

    机译：双金属;有限界面;碳纳米管;N掺杂碳;硝基芳烃还原;

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