Oxygen-vacancy rich multi-level morphology HEO for high catalytic performance oxygen evolution reactions

A FeNiCoMnSn high-entropy oxide was synthesized via calcination of a high-entropy metal-organic framework@high-entropy layered double hydroxide precursor. The inclusion of the HE-MOF in the precursor results in the enhancement of the oxygen-vacancy content as well as the creation of a multi-level morphology, both of which contribute to the exceptional catalytic activity and stability of the HEO.