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  • Highly electrocatalytic activity of RuO2 nanocrystals for triiodide reduction in dye-sensitized solar cells

    Author
    Hou, Yu
    Chen, Zu Peng
    Wang, Dong
    Zhang, Bo
    Yang, Shuang
    Wang, Hai Feng
    Hu, P.
    Zhao, Huijun
    Yang, Huagui
    Year published
    2014
    Metadata
    Show full item record
    Abstract
    Dye-sensitized solar cells (DSCs) are promising alternatives to conventional silicon devices because of their simple fabrication procedure, low cost, and high efficiency. Platinum is generally used as a superior counter electrode (CE) material, but the disadvantages such as high cost and low abundance greatly restrict the large-scale application of DSCs. An efficient and sustainable way to overcome the limited supply of Pt is the development of high-efficiency Pt-free CE materials, which should possess both high electrical conductivity and superior electrocatalytic activity simultaneously. Herein, for the first time, a ...
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    Dye-sensitized solar cells (DSCs) are promising alternatives to conventional silicon devices because of their simple fabrication procedure, low cost, and high efficiency. Platinum is generally used as a superior counter electrode (CE) material, but the disadvantages such as high cost and low abundance greatly restrict the large-scale application of DSCs. An efficient and sustainable way to overcome the limited supply of Pt is the development of high-efficiency Pt-free CE materials, which should possess both high electrical conductivity and superior electrocatalytic activity simultaneously. Herein, for the first time, a two-step strategy to synthesize ruthenium dioxide (RuO2) nanocrystals is reported, and it is shown that RuO2 catalysts exhibit promising electrocatalytic activity towards triiodide reduction, which results in comparable energy conversion efficiency to that of conventional Pt CEs. More importantly, by virtue of first-principles calculations, the catalytic mechanism of electrocatalysis for triiodide reduction on various CEs is investigated systematically and it is found that the electrochemical triiodide reduction reaction on RuO2 catalyst surfaces can be enhanced significantly, owing to the ideal combination of good electrocatalytic activity and high electrical conductivity.
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    Journal Title
    Small
    Volume
    10
    Issue
    3
    DOI
    https://doi.org/10.1002/smll.201300653
    Subject
    Inorganic Chemistry not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/67750
    Collection
    • Journal articles

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