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Successfully synthesis of FeSe2/CoFe2O4 heterojunction with high performance for hydrogen evolution reaction

Author

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  • Zhang, Huixuan
  • Nengzi, Li-chao
  • Li, Bo
  • Cheng, Qingfeng
  • Gou, Jianfeng
  • Cheng, Xiuwen

Abstract

Water splitting related to renewable energy is considered to be one of the most important strategy for hydrogen production. In this article, highly active, durable, inexpensive and magnetic FeSe2/CoFe2O4 heterojunction was fabricated via a facile two-step hydrothermal method. Subsequently, the composite was characterized by a series of physicochemical technologies, including X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microcopy (TEM), X-ray photoelectron spectra (XPS) and vibrating sample magnetometer (VSM) measurements. In order to evaluate the HER performance of the FeSe2/CoFe2O4 heterojunction, electrochemical measurements were also performed. Due to the unique band structure of FeSe2 nanorods and CoFe2O4 nanoparticles and significant coupling effect between them, the FeSe2/CoFe2O4 heterojunction exhibited excellent HER activity with a small overpotential of 231 mV at a current density of 10 mA cm−2. Besides, it had a smaller Tafel slope of 88.76 mV·dec−1 in acid media compared to single FeSe2 nanorods. At the same time, the heterojunction showed excellent mechanical stability with 9 h.

Suggested Citation

  • Zhang, Huixuan & Nengzi, Li-chao & Li, Bo & Cheng, Qingfeng & Gou, Jianfeng & Cheng, Xiuwen, 2020. "Successfully synthesis of FeSe2/CoFe2O4 heterojunction with high performance for hydrogen evolution reaction," Renewable Energy, Elsevier, vol. 155(C), pages 717-724.
    • Handle: RePEc:eee:renene:v:155:y:2020:i:c:p:717-724
    DOI: 10.1016/j.renene.2020.03.171
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    References listed on IDEAS

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    1. Haiqing Zhou & Fang Yu & Yufeng Huang & Jingying Sun & Zhuan Zhu & Robert J. Nielsen & Ran He & Jiming Bao & William A. Goddard III & Shuo Chen & Zhifeng Ren, 2016. "Efficient hydrogen evolution by ternary molybdenum sulfoselenide particles on self-standing porous nickel diselenide foam," Nature Communications, Nature, vol. 7(1), pages 1-7, November.
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    Cited by:

    1. Qian, Guangfu & Mo, Yanshan & Yu, Chen & Zhang, Hao & Yu, Tianqi & Luo, Lin & Yin, Shibin, 2020. "Free-standing bimetallic CoNiTe2 nanosheets as efficient catalysts with high stability at large current density for oxygen evolution reaction," Renewable Energy, Elsevier, vol. 162(C), pages 2190-2196.

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