Controlled Chemical Vapor Deposition for Synthesis of Nanowire Arrays of Metal-Organic Frameworks and Their Thermal Conversion to Carbon/Metal Oxide Hybrid Materials

Christine Young, Jie Wang, Jeonghun Kim, Yoshiyuki Sugahara, Joel Henzie, Yusuke Yamauchi

    Research output: Contribution to journalArticle

    88 Citations (Scopus)

    Abstract

    Metal-organic frameworks (MOFs) can serve as high-surface-area templates to generate hierarchically ordered nanoporous carbon electrodes for high-performance supercapacitor devices. Here we describe a simple chemical approach to synthesize dense three-dimensional (3D) arrays of core-shell ZnO@ZIF-8 and Co(CO3)0.5(OH)·0.11H2O@ZIF-67 nanowires on a conductive carbon cloth. Annealing the core-shell structures at high temperatures converted the MOF shell into a composite of nanoporous carbon (NC) mixed with conductive metal oxides. The conformal nature of the MOF-coating process generates a NC film with continuous conductive paths from the outer surfaces of the nanowires down to the flexible carbon electrode. Carbonization of ZIF-67 transforms the material into conductive sp2 type carbon mixed with Co3O4 nanostructures. Because Co3O4 is a faradic metal oxide with a high theoretical capacitance, these Co3O4/NC hybrid heterostructure arrays are a promising candidate material for use in an electrochemical supercapacitor device. The Co3O4/NC hybrid electrodes had good performance and exhibited a high areal capacitance of 1.22 F·cm-2 at 0.5 mA·cm-2. Conformal deposition of MOFs via the chemical vapor method offers a promising new platform to design conductive, ultrahigh surface area electrodes that preserve the 3D morphology for applications in supercapacitors and electrocatalysis.

    Original languageEnglish
    Pages (from-to)3379-3386
    Number of pages8
    JournalChemistry of Materials
    Volume30
    Issue number10
    DOIs
    Publication statusPublished - 2018 May 22

    Fingerprint

    Hybrid materials
    Oxides
    Nanowires
    Chemical vapor deposition
    Carbon
    Metals
    Electrodes
    Capacitance
    Conductive materials
    Electrocatalysis
    Metal coatings
    Organic coatings
    Carbon films
    Carbonization
    Hot Temperature
    Heterojunctions
    Nanostructures
    Vapors
    Annealing
    Composite materials

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Chemistry

    Cite this

    Controlled Chemical Vapor Deposition for Synthesis of Nanowire Arrays of Metal-Organic Frameworks and Their Thermal Conversion to Carbon/Metal Oxide Hybrid Materials. / Young, Christine; Wang, Jie; Kim, Jeonghun; Sugahara, Yoshiyuki; Henzie, Joel; Yamauchi, Yusuke.

    In: Chemistry of Materials, Vol. 30, No. 10, 22.05.2018, p. 3379-3386.

    Research output: Contribution to journalArticle

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