Quaternary Mixed Oxides of Non-Noble Metals with Enhanced Stability during the Oxygen Evolution Reaction

• DOI: 10.1021/acsami.4c10234
• Publication Date: 2024-10-13T17:54:47Z
• Authors: Alexis Piñeiro-Ga...; Xiuyu Wu; Esdras J. Canto-A...; Alice Kuzhikandathil; Mouna Rafei; Eduardo Gracia-Es...
• Keywords: Oxygen evolution; Rutile; Oxidizing agent

Robust electrocatalysts required to drive the oxygen evolution reaction (OER) during water electrolysis are still a missing component toward path for sustainable hydrogen production. Here new family of OER active quaternary mixed-oxides based on X–Sn–Mo–Sb (X = Mn, Fe, Co, or Ni) is reported. These nonstoichiometric mixed oxides form rutile-type crystal structure with random atomic motif and diverse oxidation states, leading formation cation vacancies local disorder. The successful incorporation all cations into rutile was achieved using oxidizing agents that facilitates Sb5+ characteristic octahedral coordination in rutile. exhibit enhanced stability both acidic alkaline environments under anodic potentials no changes their after extensive electrochemical stress. improved these highlights potential application as scaffolds host stabilize metals.