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  • Rational design of N-doped carbon nanobox-supported Fe/Fe2N/Fe3C nanoparticles as efficient oxygen reduction catalysts for Zn-air batteries

    Author(s)
    Cao, Lei
    Li, Zhen-huan
    Gu, Yu
    Li, Dao-hao
    Su, Kun-mei
    Yang, Dong-jiang
    Cheng, Bo-wen
    Griffith University Author(s)
    Yang, Dongjiang
    Year published
    2017
    Metadata
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    Abstract
    Zn–air battery, as a low cost, high energy density, and safe energy device, has received significant attention in recent years. However, its wide application has been hindered due to the low oxygen reduction reaction (ORR) activity in air electrodes without excellent catalysts. Herein, N-doped porous and highly graphitic carbon nanobox-supported Fe-based nanoparticles (Fe–N-CNBs), which were synthesized from fructose, NH3, and FeCl3 by a self-propagating high-temperature synthesis (SHS) process followed by a heat treatment process, were used as ORR catalysts. Fe–N-CNBs calcined at 600 °C (Fe–N-CNBs-600) showed higher ORR ...
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    Zn–air battery, as a low cost, high energy density, and safe energy device, has received significant attention in recent years. However, its wide application has been hindered due to the low oxygen reduction reaction (ORR) activity in air electrodes without excellent catalysts. Herein, N-doped porous and highly graphitic carbon nanobox-supported Fe-based nanoparticles (Fe–N-CNBs), which were synthesized from fructose, NH3, and FeCl3 by a self-propagating high-temperature synthesis (SHS) process followed by a heat treatment process, were used as ORR catalysts. Fe–N-CNBs calcined at 600 °C (Fe–N-CNBs-600) showed higher ORR activity (onset and half-wave potentials of 1.03 and 0.85 V vs. RHE, respectively), better electrochemical stability, and higher methanol tolerance than Pt/C under alkaline conditions. The outstanding ORR performance of Fe–N-CNBs-600 was attributed to the synergistic effect of Fe, Fe2N, and Fe3C nanoparticles, which was unambiguously confirmed by HRTEM and XRD characterization. Furthermore, Fe–N-CNBs-600 also exhibited higher electrochemical properties than the currently used expensive Pt/C catalyst in Zn–air batteries.
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    Journal Title
    Journal of Materials Chemistry A: Materials for Energy and Sustainability
    Volume
    5
    Issue
    22
    DOI
    https://doi.org/10.1039/c7ta03097e
    Subject
    Macromolecular and materials chemistry
    Materials engineering
    Materials engineering not elsewhere classified
    Other engineering
    Publication URI
    http://hdl.handle.net/10072/351634
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    • Journal articles

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