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  • General Oriented Formation of Carbon Nanotubes from Metal-Organic Frameworks

    Author(s)
    Meng, Jiashen
    Niu, Chaojiang
    Xu, Linhan
    Li, Jiantao
    Liu, Xiong
    Wang, Xuanpeng
    Wu, Yuzhu
    Xu, Xiaoming
    Chen, Wenyi
    Li, Qi
    Zhu, Zizhong
    Zhao, Dongyuan
    Mai, Liqiang
    Griffith University Author(s)
    Zhao, Dongyuan
    Year published
    2017
    Metadata
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    Abstract
    Carbon nanotubes (CNTs) are of great interest for many potential applications because of their extraordinary electronic, mechanical and structural properties. However, issues of chaotic staking, high cost and high energy dissipation in the synthesis of CNTs remain to be resolved. Here we develop a facile, general and high-yield strategy for the oriented formation of CNTs from metal-organic frameworks (MOFs) through a low-temperature (as low as 430 °C) pyrolysis process. The selected MOF crystals act as a single precursor for both nanocatalysts and carbon sources. The key to the formation of CNTs is obtaining small nanocatalysts ...
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    Carbon nanotubes (CNTs) are of great interest for many potential applications because of their extraordinary electronic, mechanical and structural properties. However, issues of chaotic staking, high cost and high energy dissipation in the synthesis of CNTs remain to be resolved. Here we develop a facile, general and high-yield strategy for the oriented formation of CNTs from metal-organic frameworks (MOFs) through a low-temperature (as low as 430 °C) pyrolysis process. The selected MOF crystals act as a single precursor for both nanocatalysts and carbon sources. The key to the formation of CNTs is obtaining small nanocatalysts with high activity during the pyrolysis process. This method is successfully extended to obtain various oriented CNT-assembled architectures by modulating the corresponding MOFs, which further homogeneously incorporate heteroatoms into the CNTs. Specifically, nitrogen-doped CNT-assembled hollow structures exhibit excellent performances in both energy conversion and storage. On the basis of experimental analyses and density functional theory simulations, these superior performances are attributed to synergistic effects between ideal components and multilevel structures. Additionally, the appropriate graphitic N doping and the confined metal nanoparticles in CNTs both increase the densities of states near the Fermi level and reduce the work function, hence efficiently enhancing its oxygen reduction activity. The viable synthetic strategy and proposed mechanism will stimulate the rapid development of CNTs in frontier fields.
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    Journal Title
    Journal of the American Chemical Society
    Volume
    139
    Issue
    24
    DOI
    https://doi.org/10.1021/jacs.7b01942
    Subject
    Chemical sciences
    Science & Technology
    Physical Sciences
    Chemistry, Multidisciplinary
    Chemistry
    Oxygen Reduction Reaction
    Publication URI
    http://hdl.handle.net/10072/407199
    Collection
    • Journal articles

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