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  • ZIF-Derived Carbon Nanoarchitecture as a Bifunctional pH-Universal Electrocatalyst for Energy-Efficient Hydrogen Evolution

    Author(s)
    Wang, Lin
    Cao, Junhui
    Cheng, Xiaodi
    Lei, Chaojun
    Dai, Qizhou
    Yang, Bin
    Li, Zhongjian
    Younis, M Adnan
    Lei, Lecheng
    Hou, Yang
    Ostrikov, Kostya
    Griffith University Author(s)
    Ostrikov, Ken
    Year published
    2019
    Metadata
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    Abstract
    Development of nonprecious metal-based electrocatalysts supporting hydrogen evolution reaction (HER) in the entire pH range has gained significant importance for harvesting green and renewable energy. Herein, we developed a novel electrocatalyst based on 3D carbon nanoarchitecture hybrid, which consists of CoP nanoparticles (CoP NPs) embedded into N-doped carbon nanotubes (NCNT), grafted on carbon polyhedron (CoP/NCNT-CP) that was prepared by carbonization and low-temperature phosphatization treatment of cobalt-based zeolite imidazole framework (ZIF). Benefiting from the strong synergistic effect and unique 3D structure, the ...
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    Development of nonprecious metal-based electrocatalysts supporting hydrogen evolution reaction (HER) in the entire pH range has gained significant importance for harvesting green and renewable energy. Herein, we developed a novel electrocatalyst based on 3D carbon nanoarchitecture hybrid, which consists of CoP nanoparticles (CoP NPs) embedded into N-doped carbon nanotubes (NCNT), grafted on carbon polyhedron (CoP/NCNT-CP) that was prepared by carbonization and low-temperature phosphatization treatment of cobalt-based zeolite imidazole framework (ZIF). Benefiting from the strong synergistic effect and unique 3D structure, the CoP/NCNT-CP hybrid loaded on Ni foam exhibited excellent electrocatalytic HER performance in base with a low overpotential of 165 mV at a current density of 10 mA cm–2, which is competitive with the previously reported Co-based hybrid electrocatalysts. Furthermore, the CoP/NCNT-CP also demonstrated high HER electrocatalytic activities in both neutral and acidic conditions with the overpotentials of 203 and 305 mV at the current density of 10 mA cm–2. Additionally, the bifunctional CoP/NCNT-CP electrode simultaneously acted as an anode for hydrazine oxidation reaction (HzOR) and a cathode for HER. Excellent catalytic performance was demonstrated in base conditions with a low cell potential of 0.89 V at 10 mA cm–2, which was much lower than the voltage of overall water splitting (1.91 V) at the same current density.
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    Journal Title
    ACS Sustainable Chemistry and Engineering
    Volume
    7
    Issue
    11
    DOI
    https://doi.org/10.1021/acssuschemeng.9b01315
    Subject
    Analytical chemistry
    Chemical engineering
    Science & Technology
    Physical Sciences
    Technology
    Chemistry, Multidisciplinary
    Green & Sustainable Science & Technology
    Publication URI
    http://hdl.handle.net/10072/387155
    Collection
    • Journal articles

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