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Charge-redistributed RuNi/MoN heterojunction enables efficient hydrogen evolution in a wide pH range.

Miao Miao Ren1, Xiao Hui Chen1, Ting Li1

  • 1School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.

Journal of Colloid and Interface Science
|December 13, 2024
PubMed
Summary

A novel RuNi/MoN heterostructure catalyst on carbon cloth (CC) was developed for efficient electrocatalytic hydrogen production. This advanced catalyst demonstrates excellent performance across alkaline, neutral, and acidic conditions.

Keywords:
Dual regulationElectronic interactionHeterostructureMorphology regulationWide pH range

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Electrocatalytic hydrogen production is crucial for sustainable energy.
  • Developing efficient and stable electrocatalysts is a key challenge.
  • Transition metal-based catalysts offer potential for hydrogen evolution reactions.

Purpose of the Study:

  • To construct a novel RuNi/MoN heterostructure on carbon cloth (CC) for enhanced electrocatalytic hydrogen production.
  • To investigate the dual regulation of morphology and electronic structure for improved catalytic activity.
  • To evaluate the catalyst's performance across a wide pH range.

Main Methods:

  • Synthesis of RuNi/MoN heterostructure on carbon cloth (CC) via a simple method.
  • Characterization of the material's morphology and electronic structure.
  • Electrochemical testing in alkaline, neutral, and acidic electrolytes to assess hydrogen evolution reaction (HER) activity.

Main Results:

  • The RuNi/MoN@CC exhibited a nanowire morphology inherited from the NiMoO4 precursor, increasing electrochemical active area.
  • Nickel (Ni) acted as a sacrificial reducing agent, maintaining ruthenium (Ru) in a zero oxidation state and optimizing electronic distribution.
  • The catalyst achieved current densities of -10 mA cm⁻² at overpotentials of 66 mV (alkaline), 92 mV (neutral), and 149 mV (acidic), with low Tafel slopes.

Conclusions:

  • The developed RuNi/MoN@CC demonstrates superior electrocatalytic activity and stability for hydrogen production in diverse electrolytes.
  • The dual regulation strategy effectively enhances catalyst performance.
  • This work provides valuable insights for designing efficient, wide-pH-range transition metal-based electrocatalysts.