Volume 8 Issue 2
Apr.  2023
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Article Navigation >  Green Energy&Environment  > 2023  >  8(2): 470-477
Xiaohao Ji, Xiaoyu Chen, Lijuan Zhang, Cheng Meng, Yilei He, Xing Zhang, Zumin Wang, Ranbo Yu. Anchoring nitrogen-doped Co2P nanoflakes on NiCo2O4 nanorod arrays over nickel foam as high-performance 3D electrode for alkaline hydrogen evolution. Green Energy&Environment, 2023, 8(2): 470-477. doi: 10.1016/j.gee.2021.05.010
Citation: Xiaohao Ji, Xiaoyu Chen, Lijuan Zhang, Cheng Meng, Yilei He, Xing Zhang, Zumin Wang, Ranbo Yu. Anchoring nitrogen-doped Co2P nanoflakes on NiCo2O4 nanorod arrays over nickel foam as high-performance 3D electrode for alkaline hydrogen evolution. Green Energy&Environment, 2023, 8(2): 470-477. doi: 10.1016/j.gee.2021.05.010
shu

Anchoring nitrogen-doped Co2P nanoflakes on NiCo2O4 nanorod arrays over nickel foam as high-performance 3D electrode for alkaline hydrogen evolution

doi: 10.1016/j.gee.2021.05.010

  • a. Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China;

  • b. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, 1 North 2nd Street, Zhongguancun, Haidian District, Beijing, 100190, China

Funds:

This work was financially supported by the National Key R&D Program of China, China (2018YFA0703503) and the National Natural Science Foundation of China, China (No. 51872024, 51932001 and 21971245).

  • Received date 15 March 2021, Accepted date 21 May 2021, RevRecd date 07 May 2021, Publish date 26 May 2021,
    Abstract
  • Effective and robust electrocatalysts are mainly based on innovative materials and unique structures. Herein, we designed a flakelike cobalt phosphide-based catalyst supporting on NiCo2O4 nanorods array, which in-situ grew on the nickel foam (NF) current collector, referring as N–Co2P/NiCo2O4/NF electrode. By optimizing the microstructure and electronic structure through 3D hierarchy fabrication and nitrogen doping, the catalyst features with abundant electrochemical surface area, favorable surface wettability, excellent electron transport, as well as tailored d band center. Consequently, the as-prepared N–Co2P/NiCo2O4/NF electrode exhibits an impressive HER activity with a low overpotentials of 58 mV at 10 mA cm-2, a Tafel slop of 75 mV dec-1, as well as superior durability in alkaline medium. This work may provide a new pathway to effectively improve the hydrogen evolution performance of transition metal phosphides and to develop promising electrodes for practical electrocatalysis.

     

    • • A novel nanostructured electrode with N-doped Co2P nanoflakes supported NiCo2O4 arrays on nickle foam (N–Co2P/NiCo2O4/NF) is prepared. • The 3D hierarchal architecture optimizes surficial wettability. • The nitrogen doping adjusts the d band center and tunes hydrogen adsorption, thus optimizing the thermodynamics. • N–Co2P/NiCo2O4/NF exhibits an excellent activity and durability towards alkaline HER.
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