Li and Na substituted (Fe,Co,Ni,Cu,Zn)O high entropy oxide catalysts for oxygen evolution reaction

Key Points

• The study aims to explore the effect of defect engineering in high entropy oxides for optimizing oxygen evolution reactions.
• Utilized Li and Na substituted (Fe,Co,Ni,Cu,Zn)O materials.
• Conducted stability tests for 30 hours.
• Analyzed overpotential during the oxygen evolution reaction.
• Li-added (Fe,Co,Ni,Cu,Zn)O demonstrated a low overpotential of 322 mV at 10 mA cm −2.
• Catalysts exhibited consistent stability over a 30-hour period.
• The mechanism governing performance was identified as the adsorbate evolution mechanism.