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Related Experiment Video

Updated: Jul 23, 2025

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Ru-W Pair Sites Enabling the Ensemble Catalysis for Efficient Hydrogen Evolution.

Weilong Ma1, Xiaoyu Yang2, Dingding Li1

  • 1International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Institute of Photonics and Photon-Technology, Northwest University, Xi'an, Shaanxi, 710069, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 12, 2023
PubMed
Summary
This summary is machine-generated.

Developing efficient catalysts for the hydrogen evolution reaction (HER) in alkaline media is key. This study introduces Ru-W pair sites on WO2 nanoparticles, demonstrating superior HER activity and stability.

Keywords:
Ru single-atomRu-W pair sitesefficient hydrogen evolutionoptimizing elementary steps

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Efficient hydrogen evolution reaction (HER) in alkaline media is critical for clean energy production.
  • Simultaneously optimizing elementary steps like water dissociation and hydrogen combination remains a significant challenge.

Purpose of the Study:

  • To develop highly efficient alkaline HER electrocatalysts using atomically dispersed Ru-W pair sites.
  • To investigate the synergistic effects of Ru-W sites for enhanced catalytic performance.

Main Methods:

  • Synthesis of Ru single atom-doped WO2 nanoparticles (Ru-W/WO2-800) via a crystalline lattice-confined strategy.
  • Electrochemical characterization to evaluate HER activity, including overpotential, mass activity, and stability.
  • Analysis of the synergistic catalytic mechanism involving ensemble catalysis.

Main Results:

  • Ru-W/WO2-800 exhibited excellent HER activity with a low overpotential of 11 mV at 10 mA cm⁻².
  • Achieved high mass activity (5863 mA mg⁻¹ Ru at 50 mV) and robust stability (500 h at 250 mA cm⁻²).
  • Demonstrated synergistic effects where W sites facilitate hydroxyl transfer and water dissociation, while Ru sites enhance hydrogen combination.

Conclusions:

  • The developed Ru-W/WO2-800 catalyst shows remarkable efficiency for alkaline HER.
  • Ensemble catalysis involving synergistic Ru-W pair sites is crucial for optimizing elementary steps.
  • This work presents a promising strategy for designing atomic-scale catalysts for efficient electrocatalysis.