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Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution

Author

Listed:
  • Yibing Li

    (The University of New South Wales)

  • Xin Tan

    (The Australian National University)

  • Rosalie K. Hocking

    (Swinburne University of Technology)

  • Xin Bo

    (The University of New South Wales)

  • Hangjuan Ren

    (The University of New South Wales)

  • Bernt Johannessen

    (ANSTO Australian Synchrotron)

  • Sean C. Smith

    (The Australian National University)

  • Chuan Zhao

    (The University of New South Wales)

Abstract

Nickel-based catalysts are most commonly used in industrial alkaline water electrolysis. However, it remains a great challenge to address the sluggish reaction kinetics and severe deactivation problems of hydrogen evolution reaction (HER). Here, we show a Cu-doped Ni catalyst implanted with Ni-O-VOx sites (Ni(Cu)VOx) for alkaline HER. The optimal Ni(Cu)VOx electrode exhibits a near-zero onset overpotential and low overpotential of 21 mV to deliver –10 mA cm−2, which is comparable to benchmark Pt/C catalyst. Evidence for the formation of Ni-O-VOx sites in Ni(Cu)VOx is established by systematic X-ray absorption spectroscopy studies. The VOx can cause a substantial dampening of Ni lattice and create an enlarged electrochemically active surface area. First-principles calculations support that the Ni-O-VOx sites are superactive and can promote the charge redistribution from Ni to VOx, which greatly weakens the H-adsorption and H2 release free energy over Ni. This endows the Ni(Cu)VOx electrode high HER activity and long-term durability.

Suggested Citation

  • Yibing Li & Xin Tan & Rosalie K. Hocking & Xin Bo & Hangjuan Ren & Bernt Johannessen & Sean C. Smith & Chuan Zhao, 2020. "Implanting Ni-O-VOx sites into Cu-doped Ni for low-overpotential alkaline hydrogen evolution," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16554-5
    DOI: 10.1038/s41467-020-16554-5
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    Cited by:

    1. Hongming Sun & Zhenhua Yan & Caiying Tian & Cha Li & Xin Feng & Rong Huang & Yinghui Lan & Jing Chen & Cheng-Peng Li & Zhihong Zhang & Miao Du, 2022. "Bixbyite-type Ln2O3 as promoters of metallic Ni for alkaline electrocatalytic hydrogen evolution," Nature Communications, Nature, vol. 13(1), pages 1-13, December.
    2. Yilin Deng & Wei Lai & Bin Xu, 2020. "A Mini Review on Doped Nickel-Based Electrocatalysts for Hydrogen Evolution Reaction," Energies, MDPI, vol. 13(18), pages 1-17, September.

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