Abstract
The oxygen evolution reaction (OER) plays a key role in emerging energy conversion technologies such as rechargeable metal‐air batteries, and direct solar water splitting. Herein, a remarkably low overpotential of ≈150 mV at 10 mA cm−2 disk in alkaline solutions using one of the non‐Fermi liquids, Hg2Ru2O7, is reported. Hg2Ru2O7 displays a rapid increase in current density and excellent durability as an OER catalyst. This outstanding catalytic performance is realized through the coexistence of localized d‐bands with the metallic state that is unique to non‐Fermi liquids. The findings indicate that non‐Fermi liquids could greatly improve the design of highly active OER catalysts.
Highlights
IrO2[12] display high current densities and facilitate the reaction, most of them have conversion technologies such as rechargeable metal-air batteries, and direct room for improvement in their overpotensolar water splitting
Fermi liquids
The findings indicate that non-Fermi liquids could greatly improve the design of highly active oxygen evolution reaction (OER) catalysts
Summary
IrO2[12] display high current densities and facilitate the reaction, most of them have conversion technologies such as rechargeable metal-air batteries, and direct room for improvement in their overpotensolar water splitting. Overlap between the unoccupied metallic state (where antibonding eg orbitals exist) and the O 2p band of the oxygen adsorbates becomes too large, and rapid amorphization occurs at the surface during electron transfer when bonds are weakened.[8,15,16]
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