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  • Facet-dependent catalytic activity of platinum nanocrystals for triiodide reduction in dye-sensitized solar cells

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    Author(s)
    Zhang, Bo
    Wang, Dong
    Hou, Yu
    Yang, Shuang
    Yang, Xiao Hua
    Zhong, Ju Hua
    Liu, Jian
    Wang, Hai Feng
    Hu, P
    Zhao, Hui Jun
    Yang, Hua Gui
    Griffith University Author(s)
    Zhao, Huijun
    Yang, Huagui
    Year published
    2013
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    Abstract
    Platinum (Pt) nanocrystals have demonstrated to be an effective catalyst in many heterogeneous catalytic processes. However, pioneer facets with highest activity have been reported differently for various reaction systems. Although Pt has been the most important counter electrode material for dye-sensitized solar cells (DSCs), suitable atomic arrangement on the exposed crystal facet of Pt for triiodide reduction is still inexplicable. Using density functional theory, we have investigated the catalytic reaction processes of triiodide reduction over {100}, {111} and {411} facets, indicating that the activity follows the order ...
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    Platinum (Pt) nanocrystals have demonstrated to be an effective catalyst in many heterogeneous catalytic processes. However, pioneer facets with highest activity have been reported differently for various reaction systems. Although Pt has been the most important counter electrode material for dye-sensitized solar cells (DSCs), suitable atomic arrangement on the exposed crystal facet of Pt for triiodide reduction is still inexplicable. Using density functional theory, we have investigated the catalytic reaction processes of triiodide reduction over {100}, {111} and {411} facets, indicating that the activity follows the order of Pt(111) > Pt(411) > Pt(100). Further, Pt nanocrystals mainly bounded by {100}, {111} and {411} facets were synthesized and used as counter electrode materials for DSCs. The highest photovoltaic conversion efficiency of Pt(111) in DSCs confirms the predictions of the theoretical study. These findings have deepened the understanding of the mechanism of triiodide reduction at Pt surfaces and further screened the best facet for DSCs successfully.
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    Journal Title
    Scientific Reports
    Volume
    3
    DOI
    https://doi.org/10.1038/srep01836
    Copyright Statement
    © The Author(s) 2013. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License, which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
    Subject
    Electrochemistry
    Inorganic Green Chemistry
    Publication URI
    http://hdl.handle.net/10072/55694
    Collection
    • Journal articles

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