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Graphene/MoS2/FeCoNi(OH)x and Graphene/MoS2/FeCoNiPx multilayer-stacked vertical nanosheets on carbon fibers for highly efficient overall water splitting

Author

Listed:
  • Xixi Ji

    (Harbin Institute of Technology, Shenzhen, University Town)

  • Yanhong Lin

    (Harbin Institute of Technology, Shenzhen, University Town)

  • Jie Zeng

    (Harbin Institute of Technology, Shenzhen, University Town)

  • Zhonghua Ren

    (Harbin Institute of Technology, Shenzhen, University Town)

  • Zijia Lin

    (Harbin Institute of Technology, Shenzhen, University Town)

  • Yongbiao Mu

    (Harbin Institute of Technology, Shenzhen, University Town)

  • Yejun Qiu

    (Harbin Institute of Technology, Shenzhen, University Town)

  • Jie Yu

    (Harbin Institute of Technology, Shenzhen, University Town)

Abstract

Development of excellent and cheap electrocatalysts for water electrolysis is of great significance for application of hydrogen energy. Here, we show a highly efficient and stable oxygen evolution reaction (OER) catalyst with multilayer-stacked hybrid structure, in which vertical graphene nanosheets (VGSs), MoS2 nanosheets, and layered FeCoNi hydroxides (FeCoNi(OH)x) are successively grown on carbon fibers (CF/VGSs/MoS2/FeCoNi(OH)x). The catalyst exhibits excellent OER performance with a low overpotential of 225 and 241 mV to attain 500 and 1000 mA cm−2 and small Tafel slope of 29.2 mV dec−1. Theoretical calculation indicates that compositing of FeCoNi(OH)x with MoS2 could generate favorable electronic structure and decrease the OER overpotential, promoting the electrocatalytic activity. An alkaline water electrolyzer is established using CF/VGSs/MoS2/FeCoNi(OH)x anode for overall water splitting, which generates a current density of 100 mA cm−2 at 1.59 V with excellent stability over 100 h. Our highly efficient catalysts have great prospect for water electrolysis.

Suggested Citation

  • Xixi Ji & Yanhong Lin & Jie Zeng & Zhonghua Ren & Zijia Lin & Yongbiao Mu & Yejun Qiu & Jie Yu, 2021. "Graphene/MoS2/FeCoNi(OH)x and Graphene/MoS2/FeCoNiPx multilayer-stacked vertical nanosheets on carbon fibers for highly efficient overall water splitting," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21742-y
    DOI: 10.1038/s41467-021-21742-y
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    Cited by:

    1. Lei, Yuanting & Zhang, Lili & Zhou, Danni & Xiong, Chengli & Zhao, Yafei & Chen, Wenxing & Xiang, Xu & Shang, Huishan & Zhang, Bing, 2022. "Construction of interconnected NiO/CoFe alloy nanosheets for overall water splitting," Renewable Energy, Elsevier, vol. 194(C), pages 459-468.

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