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  • Plasma-Triggered Synergy of Exfoliation, Phase Transformation, and Surface Engineering in Cobalt Diselenide for Enhanced Water Oxidation

    Author(s)
    Wang, Xin
    Zhuang, Linzhou
    Jia, Yi
    Liu, Hongli
    Yan, Xuecheng
    Zhang, Longzhou
    Yang, Dongjiang
    Zhu, Zhonghua
    Yao, Xiangdong
    Griffith University Author(s)
    Jia, Yi
    Yan, Xuecheng
    Year published
    2018
    Metadata
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    Abstract
    Various strategies, such as increasing active site numbers and structural and surface engineering, have been used to improve the oxygen evolution reaction (OER) performance of transition‐metal dichalcogenides. However, it is challenging to combine these strategies in one system to realize the full catalytic potential. Now, an Ar/O2 plasma method is used to simultaneously induce exfoliation, surface reorganization (formation of an oxidative layer with rich oxygen vacancies), and phase transformation (cubic‐to‐orthorhombic) on CoSe2 to generate an exceptionally outstanding OER electrocatalysts. The as‐made samples require an ...
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    Various strategies, such as increasing active site numbers and structural and surface engineering, have been used to improve the oxygen evolution reaction (OER) performance of transition‐metal dichalcogenides. However, it is challenging to combine these strategies in one system to realize the full catalytic potential. Now, an Ar/O2 plasma method is used to simultaneously induce exfoliation, surface reorganization (formation of an oxidative layer with rich oxygen vacancies), and phase transformation (cubic‐to‐orthorhombic) on CoSe2 to generate an exceptionally outstanding OER electrocatalysts. The as‐made samples require an overpotential of only 251 mV at 10 mA cm−2, outperforming commercial RuO2 and most reported OER catalysts. The striking catalytic activity originates from the optimized chemical and electronic environment. This work provides valuable insights into the design of promising OER electrocatalysts with high natural abundance via multilevel structural modulation.
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    Journal Title
    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
    Volume
    57
    Issue
    50
    DOI
    https://doi.org/10.1002/anie.201810199
    Subject
    Chemical sciences
    Publication URI
    http://hdl.handle.net/10072/383022
    Collection
    • Journal articles

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