能源化学(英文版) ›› 2019, Vol. 39 ›› Issue (12): 61-67.

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Directional construction of Cu2S branch arrays for advanced oxygen evolution reaction

Shengjue Denga, Yanbin Shena, Dong Xieb, Yangfan Lua, Xiaolong Yuc, Liang Yangc, Xiuli Wanga, Xinhui Xiaa, Jiangping Tua   

  1. a State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;
    b Guangdong Engineering and Technology Research Center for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, Guangdong, China;
    c State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, Hainan, China
  • 收稿日期:2018-12-22 修回日期:2019-01-09 出版日期:2019-12-15 发布日期:2020-12-18
  • 通讯作者: Liang Yang, yl5923@hainu.edu.cn; Xinhui Xia, helloxxh@zju.edu.cn; Jiangping Tu, tujp@zju.edu.cn
  • 基金资助:
    This work is supported by the National Natural Science Foundation of China (Grant Nos. 51728204 and 51772272), Fundamental Research Funds for the Central Universities (Grant No. 2018QNA4011), Qianjiang Talents Plan D (QJD1602029), Startup Foundation for Hundred-Talent Program of Zhejiang University.

Directional construction of Cu2S branch arrays for advanced oxygen evolution reaction

Shengjue Denga, Yanbin Shena, Dong Xieb, Yangfan Lua, Xiaolong Yuc, Liang Yangc, Xiuli Wanga, Xinhui Xiaa, Jiangping Tua   

  1. a State Key Laboratory of Silicon Materials, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, and School of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;
    b Guangdong Engineering and Technology Research Center for Advanced Nanomaterials, School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, Guangdong, China;
    c State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, Hainan, China
  • Received:2018-12-22 Revised:2019-01-09 Online:2019-12-15 Published:2020-12-18
  • Contact: Liang Yang, yl5923@hainu.edu.cn; Xinhui Xia, helloxxh@zju.edu.cn; Jiangping Tu, tujp@zju.edu.cn
  • Supported by:
    This work is supported by the National Natural Science Foundation of China (Grant Nos. 51728204 and 51772272), Fundamental Research Funds for the Central Universities (Grant No. 2018QNA4011), Qianjiang Talents Plan D (QJD1602029), Startup Foundation for Hundred-Talent Program of Zhejiang University.

摘要: Metal sulphide electrocatalyst is considered as one of the most promising low-cost candidates for oxygen evolution reaction (OER). In this work, we report a novel free-standing Cu2S branch array via a facile TiO2-induced electrodeposition-sulfurization method. Interestingly, cross-linked Cu2S nanoflake branch is strongly anchored on the TiO2 backbone forming high-quality Cu2S/TiO2/Cu2S core-branch arrays. The branch formation mechanism is also proposed. As compared to the pure Cu2S nanowire arrays, the asprepared Cu2S/TiO2/Cu2S core-branch arrays show much better alkaline OER performance with lower overpotential (284 mV at 10 mA cm-2) and smaller Tafel slope (72 dec-1) as well as enhanced longterm durability mainly due to larger exposed area and more active electrocatalytic sites. Our work provides a new way for construction of advanced metal sulphide electrocatalysts for electrochemical energy conversion.

关键词: Copper sulphide, Titanium oxide, Core-branch arrays, Water splitting, Oxygen evolution reaction

Abstract: Metal sulphide electrocatalyst is considered as one of the most promising low-cost candidates for oxygen evolution reaction (OER). In this work, we report a novel free-standing Cu2S branch array via a facile TiO2-induced electrodeposition-sulfurization method. Interestingly, cross-linked Cu2S nanoflake branch is strongly anchored on the TiO2 backbone forming high-quality Cu2S/TiO2/Cu2S core-branch arrays. The branch formation mechanism is also proposed. As compared to the pure Cu2S nanowire arrays, the asprepared Cu2S/TiO2/Cu2S core-branch arrays show much better alkaline OER performance with lower overpotential (284 mV at 10 mA cm-2) and smaller Tafel slope (72 dec-1) as well as enhanced longterm durability mainly due to larger exposed area and more active electrocatalytic sites. Our work provides a new way for construction of advanced metal sulphide electrocatalysts for electrochemical energy conversion.

Key words: Copper sulphide, Titanium oxide, Core-branch arrays, Water splitting, Oxygen evolution reaction