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  • Nanosheets Co3O4 Interleaved with Graphene for Highly Efficient Oxygen Reduction

    Author(s)
    Odedairo, Taiwo
    Yan, Xuecheng
    Ma, Jun
    Jiao, Yalong
    Yao, Xiangdong
    Du, Aijun
    Zhu, Zhonghua
    Griffith University Author(s)
    Yao, Xiangdong
    Yan, Xuecheng
    Year published
    2015
    Metadata
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    Abstract
    Efficient yet inexpensive electrocatalysts for oxygen reduction reaction (ORR) are an essential component of renewable energy devices, such as fuel cells and metal-air batteries. We herein interleaved novel Co3O4 nanosheets with graphene to develop a first ever sheet-on-sheet heterostructured electrocatalyst for ORR, whose electrocatalytic activity outperformed the state-of-the-art commercial Pt/C with exceptional durability in alkaline solution. The composite demonstrates the highest activity of all the nonprecious metal electrocatalysts, such as those derived from Co3O4 nanoparticle/nitrogen-doped graphene hybrids and ...
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    Efficient yet inexpensive electrocatalysts for oxygen reduction reaction (ORR) are an essential component of renewable energy devices, such as fuel cells and metal-air batteries. We herein interleaved novel Co3O4 nanosheets with graphene to develop a first ever sheet-on-sheet heterostructured electrocatalyst for ORR, whose electrocatalytic activity outperformed the state-of-the-art commercial Pt/C with exceptional durability in alkaline solution. The composite demonstrates the highest activity of all the nonprecious metal electrocatalysts, such as those derived from Co3O4 nanoparticle/nitrogen-doped graphene hybrids and carbon nanotube/nanoparticle composites. Density functional theory (DFT) calculations indicated that the outstanding performance originated from the significant charge transfer from graphene to Co3O4 nanosheets promoting the electron transport through the whole structure. Theoretical calculations revealed that the enhanced stability can be ascribed to the strong interaction generated between both types of sheets.
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    Journal Title
    ACS Applied Materials and Interfaces
    Volume
    7
    Issue
    38
    DOI
    https://doi.org/10.1021/acsami.5b06063
    Subject
    Chemical sciences
    Engineering
    Chemical engineering not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/101421
    Collection
    • Journal articles

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