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  • Manipulating the Architecture of Atomically Thin Transition Metal (Hydr)oxides for Enhanced Oxygen Evolution Catalysis

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    DouPUB6089.pdf (2.209Mb)
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    Accepted Manuscript (AM)
    Author(s)
    Dou, Yuhai
    Zhang, Lei
    Xu, Jiantie
    He, Chun-Ting
    Xu, Xun
    Sung, Ziqi
    Liao, Ting
    Nagy, Balazs
    Liu, Porun
    Dou, Shi Xue
    Griffith University Author(s)
    Liu, Porun
    Zhang, Lei
    Dou, Yuhai
    Year published
    2018
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    Abstract
    Graphene-like nanomaterials have received tremendous research interest due to their atomic thickness and fascinating properties. Previous studies mainly focus on the modulation of their electronic structures, which undoubtedly optimizes the electronic properties, but is not the only determinant of performance in practical applications. Herein, we propose a generalized strategy to incrementally manipulate the architectures of several atomically thin transition metal (hydr)oxides, and study their effects on catalytic water oxidation. The results demonstrate the obvious superiority of a wrinkled nanosheet architecture in both ...
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    Graphene-like nanomaterials have received tremendous research interest due to their atomic thickness and fascinating properties. Previous studies mainly focus on the modulation of their electronic structures, which undoubtedly optimizes the electronic properties, but is not the only determinant of performance in practical applications. Herein, we propose a generalized strategy to incrementally manipulate the architectures of several atomically thin transition metal (hydr)oxides, and study their effects on catalytic water oxidation. The results demonstrate the obvious superiority of a wrinkled nanosheet architecture in both catalytic activity and durability. For instance, wrinkled Ni(OH)2 nanosheets display a low overpotential of 358.2 mV at 10 mA cm–2, a high current density of 187.2 mA cm–2 at 500 mV, a small Tafel slope of 54.4 mV dec–1, and excellent long-term durability with gradually optimized performance, significantly outperforming other nanosheet architectures and previously reported catalysts. The outstanding catalytic performance is mainly attributable to the 3D porous network structure constructed by wrinkled nanosheets, which not only provides sufficient contact between electrode materials and current collector, but also offers highly accessible channels for facile electrolyte diffusion and efficient O2 escape. Our study provides a perspective on improving the performance of graphene-like nanomaterials in a wide range of practical applications.
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    Journal Title
    ACS Nano
    Volume
    12
    Issue
    2
    DOI
    https://doi.org/10.1021/acsnano.7b08691
    Copyright Statement
    © 2018 This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright 2018 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see 10.1021/acsnano.7b08691
    Subject
    Other environmental sciences not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/378674
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    • Journal articles

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