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  • Tuning Surface Lattice Strain toward a Pt-Skin CoPtx Truncated Octahedron for Hydrogen Evolution Reaction

    Author(s)
    Lin, Liu
    Sun, Zemin
    Yao, Huiying
    Yuan, Mengwei
    Yang, Han
    Li, Huifeng
    Zhang, Qinghua
    Wang, Dawei
    Gu, Lin
    Sun, Genban
    Zhu, Jia
    Fang, Weihai
    Tang, Zhiyong
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2019
    Metadata
    Show full item record
    Abstract
    Lattice strain plays a critical role in controlling catalytic performance. However, few experiments or theoretical works have been reported regarding the strain–activity relationship in the hydrogen evolution reaction (HER). Herein, we have prepared platinum–skin-truncated octahedra with the formula CoPtx. Among the prepared nanocatalysts of varied composition, the CoPt2 nanocatalyst exhibits an extremely small overpotential of 17 mV in acid solution at −10 mA cm–2, which is obviously superior to commercial Pt/C (30 mV). Furthermore, the overpotential of the CoPt2 nanocatalyst is only 20 mV in alkaline solution, which is ...
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    Lattice strain plays a critical role in controlling catalytic performance. However, few experiments or theoretical works have been reported regarding the strain–activity relationship in the hydrogen evolution reaction (HER). Herein, we have prepared platinum–skin-truncated octahedra with the formula CoPtx. Among the prepared nanocatalysts of varied composition, the CoPt2 nanocatalyst exhibits an extremely small overpotential of 17 mV in acid solution at −10 mA cm–2, which is obviously superior to commercial Pt/C (30 mV). Furthermore, the overpotential of the CoPt2 nanocatalyst is only 20 mV in alkaline solution, which is about a third of that of commercial Pt/C (53 mV). The experiments and density functional theory calculations reveal a “volcano”-type relationship for the strain-HER catalytic activity relationship for the first time. The theoretical calculated “volcano” relationship gives a clearer scope of the best strain toward further investigation on higher HER activity.
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    Journal Title
    Journal of Physical Chemistry C
    Volume
    123
    Issue
    49
    DOI
    https://doi.org/10.1021/acs.jpcc.9b09001
    Subject
    Chemical sciences
    Engineering
    Science & Technology
    Physical Sciences
    Chemistry, Physical
    Nanoscience & Nanotechnology
    Publication URI
    http://hdl.handle.net/10072/393283
    Collection
    • Journal articles

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