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NiMo solid-solution alloy porous nanofiber as outstanding hydrogen evolution electrocatalyst.

Min Sun1, Qing Ye1, Lu Lin1

  • 1Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710127, China.

Journal of Colloid and Interface Science
|January 27, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces novel NiMo alloy nanofibers as a highly efficient electrocatalyst for the hydrogen evolution reaction (HER). These robust nanofibers demonstrate superior activity and durability for large-scale hydrogen production.

Keywords:
Hydrogen evolution reactionNiMoPorous nanofiberSolid-solution alloy electrocatalyst

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing efficient electrocatalysts is crucial for large-scale hydrogen production via the hydrogen evolution reaction (HER).
  • Existing catalysts often face challenges in terms of activity, stability, and cost-effectiveness.

Purpose of the Study:

  • To develop a robust and high-efficiency electrocatalyst for the hydrogen evolution reaction (HER).
  • To investigate the performance of NiMo solid-solution alloy porous nanofibers as an HER electrocatalyst.

Main Methods:

  • Fabrication of NiMo solid-solution alloy porous nanofibers using electrospinning, oxidization, and high-temperature reduction.
  • Electrochemical evaluation of the catalyst's HER activity and durability in a 1 M KOH electrolyte.

Main Results:

  • The NiMo alloy nanofibers exhibited significantly higher HER activity compared to Ni nanofibers.
  • The catalyst required low overpotentials of 69, 208, and 300 mV at current densities of 100, 500, and 1000 mA cm⁻², respectively.
  • Outstanding durability was observed at 100 mA cm⁻² for over 60 hours.

Conclusions:

  • NiMo solid-solution alloy porous nanofibers represent a promising candidate for high-efficiency HER electrocatalysis.
  • The findings offer valuable insights for designing robust, alloy-based electrocatalysts for hydrogen production.