Non-Fermi Liquids as Highly Active Oxygen Evolution Reaction Catalysts

Area of Science:

• Electrochemistry
• Materials Science
• Energy Conversion

Background:

• The oxygen evolution reaction (OER) is critical for rechargeable metal-air batteries and solar water splitting.
• Developing efficient OER catalysts is essential for advancing these energy technologies.

Purpose of the Study:

• To investigate the potential of non-Fermi liquids, specifically Hg2Ru2O7, as catalysts for the oxygen evolution reaction.
• To evaluate the catalytic performance, including overpotential and durability, of Hg2Ru2O7 in alkaline solutions.

Main Methods:

• Electrochemical characterization of Hg2Ru2O7 in alkaline media.
• Assessment of catalytic activity and durability under OER conditions.

Main Results:

• Hg2Ru2O7 exhibited a low overpotential of approximately 150 mV at 10 mA cm-2.
• The material demonstrated a rapid increase in current density and excellent durability.
• The catalytic performance is attributed to the unique coexistence of localized d-bands and a metallic state in non-Fermi liquids.

Conclusions:

• Hg2Ru2O7 shows remarkable OER catalytic activity and stability.
• Non-Fermi liquids represent a promising class of materials for designing advanced OER catalysts.
• This discovery could significantly improve the efficiency of energy conversion devices.