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  • Hydrothermal transformation of dried grass into graphitic carbon-based high performance electrocatalyst for oxygen reduction reaction

    Author(s)
    Zhang, Haimin
    Wang, Yun
    Wang, Dan
    Li, Yibing
    Liu, Xiaolu
    Liu, Porun
    Yang, Huagui
    An, Taicheng
    Tang, Zhiyong
    Zhao, Huijun
    Griffith University Author(s)
    Zhao, Huijun
    Liu, Porun
    Wang, Yun
    Year published
    2014
    Metadata
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    Abstract
    In this work, we present a low cost and environmentally benign hydrothermal method using dried grass as the sole starting material without any synthetic chemicals to directly produce high quality nitrogen-doped carbon nanodot/nanosheet aggregates (N-CNAs), achieving a high yield of 25.2%. The fabricated N-CNAs possess an N/C atomic ratio of 3.41%, consist of three typed of doped N at a ratio of 2.6 (pyridinic):1.7 (pyrrolic):1 (graphitic). The experimental results reveal that for oxygen reduction reaction (ORR), the performance of N-CNAs, in terms of electrocatalytic activity, stability and resistance to crossover effects, ...
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    In this work, we present a low cost and environmentally benign hydrothermal method using dried grass as the sole starting material without any synthetic chemicals to directly produce high quality nitrogen-doped carbon nanodot/nanosheet aggregates (N-CNAs), achieving a high yield of 25.2%. The fabricated N-CNAs possess an N/C atomic ratio of 3.41%, consist of three typed of doped N at a ratio of 2.6 (pyridinic):1.7 (pyrrolic):1 (graphitic). The experimental results reveal that for oxygen reduction reaction (ORR), the performance of N-CNAs, in terms of electrocatalytic activity, stability and resistance to crossover effects, is better or comparable to the commercial Pt/C electrocatalyst. The theoretical studies further indicate that the doped pyridinic-N plays a key role for N-CNAs' excellent four-electron ORR electrocatalytic activity.
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    Journal Title
    Small
    Volume
    10
    Issue
    16
    DOI
    https://doi.org/10.1002/smll.201400781
    Subject
    Organic chemistry not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/67784
    Collection
    • Journal articles

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