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Related Concept Videos

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...

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Molybdenum-Enriched Mo0.5Ru0.5O2 Nanoparticles for Efficient and Stable Oxygen Evolution Reaction.

Kaizhu Zeng1, In Gyeom Kim2, Fangyuan Liu1

  • 1Department of Electrical and Computer Engineering, Yale University, New Haven, CT, 06511, USA.

Advanced Materials (Deerfield Beach, Fla.)
|December 9, 2025
PubMed
Summary

A novel molybdenum-doped ruthenium dioxide (Mo-RuO2) nanoparticle catalyst demonstrates enhanced stability and activity for the acidic oxygen evolution reaction (OER). This breakthrough addresses the limitations of traditional ruthenium dioxide catalysts, paving the way for more durable and efficient electrochemical applications.

Keywords:
catalystshigh‐temperature thermal shock in oxygenoxygen evolution reactionsingle‐phase Mo0.5Ru0.5O2stability

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Ruthenium dioxide (RuO2) exhibits high activity for the acidic oxygen evolution reaction (OER).
  • Poor long-term stability of RuO2 hinders its practical application in OER.
  • Developing stable and active OER catalysts is crucial for energy conversion technologies.

Purpose of the Study:

  • To synthesize a highly stable and active single-phase Mo0.5Ru0.5O2 nanoparticle catalyst.
  • To investigate the effect of molybdenum doping on the OER performance and stability of RuO2.
  • To explore a novel synthesis method for advanced OER catalysts.

Main Methods:

  • Synthesis of Mo0.5Ru0.5O2 nanoparticles using high-temperature thermal shock treatment under oxygen (HTSO).
  • Rapid heating to ≈1200 °C for ≈0.05 s followed by quenching at ≈10^4 °C s^-1.
  • Characterization of nanoparticle size, elemental mixing, and electrochemical performance in acidic OER.

Main Results:

  • The HTSO method produced uniform ≈10 nm Mo0.5Ru0.5O2 nanoparticles with homogeneous elemental distribution.
  • The Mo0.5Ru0.5O2 catalyst achieved an overpotential of 210 mV at 10 mA cm^-2.
  • Exceptional stability was demonstrated, maintaining performance over 300 h at 50 mA cm^-2, surpassing pure RuO2.

Conclusions:

  • Molybdenum doping effectively enhances the stability and activity of RuO2 for acidic OER.
  • The HTSO synthesis method overcomes phase separation issues, enabling stable lattice substitution.
  • This approach offers a versatile platform for developing cost-effective and stable doped RuO2 OER catalysts.