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  • Ultrathin Nitrogen-Doped Holey Carbon@Graphene Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions in Alkaline and Acidic Media

    Author(s)
    Sun, Jiqing
    Lowe, Sean E
    Zhang, Lijuan
    Wang, Yazhou
    Pang, Kanglei
    Wang, Yun
    Zhong, Yulin
    Liu, Porun
    Zhao, Kun
    Tang, Zhiyong
    Zhao, Huijun
    Griffith University Author(s)
    Wang, Yun
    Zhong, Yulin
    Zhao, Huijun
    Liu, Porun
    Year published
    2018
    Metadata
    Show full item record
    Abstract
    Efficient nonprecious‐metal oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts are key for the commercial viability of fuel cells, metal–air batteries, and water‐splitting systems. Thus, high‐performance ORR and OER electrocatalysts in acidic electrolytes are needed to support high‐efficiency proton exchange membrane (PEM)‐based systems. Herein, we report a new approach to design and prepare an ultrathin N‐doped holey carbon layer (HCL) on a graphene sheet that exhibits outstanding bifunctional ORR/OER activities in both alkaline and acidic media. The edge sites of HCL are utilized to achieve ...
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    Efficient nonprecious‐metal oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts are key for the commercial viability of fuel cells, metal–air batteries, and water‐splitting systems. Thus, high‐performance ORR and OER electrocatalysts in acidic electrolytes are needed to support high‐efficiency proton exchange membrane (PEM)‐based systems. Herein, we report a new approach to design and prepare an ultrathin N‐doped holey carbon layer (HCL) on a graphene sheet that exhibits outstanding bifunctional ORR/OER activities in both alkaline and acidic media. The edge sites of HCL are utilized to achieve selective doping of highly active pyridinic‐N. The sandwiched graphene sheet provides mechanical support, stabilizes HCL structure and promotes charge transfer. The synergetic effect of the catalyst structure overcomes the drawbacks of holey graphene approaches. The resulting ORR and OER performances are equal to or better than the top‐ranked electrocatalysts.
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    Journal Title
    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
    Volume
    57
    Issue
    50
    DOI
    https://doi.org/10.1002/anie.201811573
    Subject
    Chemical sciences
    Publication URI
    http://hdl.handle.net/10072/382868
    Collection
    • Journal articles

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