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  • Ultrathin metal–organic framework nanosheets for electrocatalytic oxygen evolution

    Author(s)
    Zhao, Shenlong
    Wang, Yun
    Dong, Juncai
    He, Chun-Ting
    Yin, Huajie
    An, Pengfei
    Zhao, Kun
    Zhang, Xiaofei
    Gao, Chao
    Zhang, Lijuan
    Lv, Jiawei
    Wang, Jinxin
    Zhang, Jianqi
    Khattak, Abdul Muqsit
    Khan, Niaz Ali
    Wei, Zhixiang
    Zhang, Jing
    Liu, Shaoqin
    Zhao, Huijun
    Tang, Zhiyong
    Griffith University Author(s)
    Zhao, Huijun
    Wang, Yun
    Year published
    2016
    Metadata
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    Abstract
    The design and synthesis of efficient electrocatalysts are important for electrochemical conversion technologies. The oxygen evolution reaction (OER) is a key process in such conversions, having applications in water splitting and metal–air batteries. Here, we report ultrathin metal–organic frameworks (MOFs) as promising electrocatalysts for the OER in alkaline conditions. Our as-prepared ultrathin NiCo bimetal–organic framework nanosheets on glassy-carbon electrodes require an overpotential of 250 mV to achieve a current density of 10 mA cm−2. When the MOF nanosheets are loaded on copper foam, this decreases to 189 mV. We ...
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    The design and synthesis of efficient electrocatalysts are important for electrochemical conversion technologies. The oxygen evolution reaction (OER) is a key process in such conversions, having applications in water splitting and metal–air batteries. Here, we report ultrathin metal–organic frameworks (MOFs) as promising electrocatalysts for the OER in alkaline conditions. Our as-prepared ultrathin NiCo bimetal–organic framework nanosheets on glassy-carbon electrodes require an overpotential of 250 mV to achieve a current density of 10 mA cm−2. When the MOF nanosheets are loaded on copper foam, this decreases to 189 mV. We propose that the surface atoms in the ultrathin MOF sheets are coordinatively unsaturated—that is, they have open sites for adsorption—as evidenced by a suite of measurements, including X-ray spectroscopy and density-functional theory calculations. The findings suggest that the coordinatively unsaturated metal atoms are the dominating active centres and the coupling effect between Ni and Co metals is crucial for tuning the electrocatalytic activity.
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    Journal Title
    Nature Energy
    Volume
    1
    DOI
    https://doi.org/10.1038/NENERGY.2016.184
    Subject
    Inorganic green chemistry
    Environmental engineering
    Publication URI
    http://hdl.handle.net/10072/100906
    Collection
    • Journal articles

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