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  • Phosphorus oxoanion-intercalated layered double hydroxides for high-performance oxygen evolution

    Author(s)
    Luo, Ma
    Cai, Zhao
    Wang, Cheng
    Bi, Yongmin
    Qian, Li
    Hao, Yongchao
    Li, Li
    Kuang, Yun
    Li, Yaping
    Lei, Xiaodong
    Huo, Ziyang
    Liu, Wen
    Wang, Hailiang
    Sun, Xiaoming
    Duan, Xue
    Griffith University Author(s)
    Huo, Ziyang
    Year published
    2017
    Metadata
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    Abstract
    Rational design and controlled fabrication of efficient and cost-effective electrodes for the oxygen evolution reaction (OER) are critical for addressing the unprecedented energy crisis. Nickel–iron layered double hydroxides (NiFe-LDHs) with specific interlayer anions (i.e. phosphate, phosphite, and hypophosphite) were fabricated by a co-precipitation method and investigated as oxygen evolution electrocatalysts. Intercalation of the phosphorus oxoanion enhanced the OER activity in an alkaline solution; the optimal performance (i.e., a low onset potential of 215 mV, a small Tafel slope of 37.7 mV/dec, and stable electrochemical ...
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    Rational design and controlled fabrication of efficient and cost-effective electrodes for the oxygen evolution reaction (OER) are critical for addressing the unprecedented energy crisis. Nickel–iron layered double hydroxides (NiFe-LDHs) with specific interlayer anions (i.e. phosphate, phosphite, and hypophosphite) were fabricated by a co-precipitation method and investigated as oxygen evolution electrocatalysts. Intercalation of the phosphorus oxoanion enhanced the OER activity in an alkaline solution; the optimal performance (i.e., a low onset potential of 215 mV, a small Tafel slope of 37.7 mV/dec, and stable electrochemical behavior) was achieved with the hypophosphite-intercalated NiFe-LDH catalyst, demonstrating dramatic enhancement over the traditional carbonate-intercalated NiFe-LDH in terms of activity and durability. This enhanced performance is attributed to the interaction between the intercalated phosphorous oxoanions and the edge-sharing MO6 (M = Ni, Fe) layers, which modifies the surface electronic structure of the Ni sites. This concept should be inspiring for the design of more effective LDH-based oxygen evolution electrocatalysts.
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    Journal Title
    Nano Research
    Volume
    10
    Issue
    5
    DOI
    https://doi.org/10.1007/s12274-017-1437-2
    Subject
    Other chemical sciences not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/342198
    Collection
    • Journal articles

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