Abstract
? 2022 Elsevier B.V.Perovskite oxides with a low overpotential and fine stability for oxygen evolution reaction (OER) are critical for achieving efficient energy conversion and storage. Herein, we reported a simple one-step approach to synthesize SrCo0.5Fe0.3Mo0.2O3-δ/Co3O4 heterostructure catalyst by adjusting the stoichiometric ratio of Co in the perovskite of SrCoxFe0.3Mo0.2O3-δ. Multiple active sites, abundant oxygen vacancies and rapid charge transfer induced by dispersed and tight interfaces generate unique synergy. SrCo1.7Fe0.3Mo0.2O3-δ oxide with optimized composite structure only needs 277 mV to reach a current density of 10 mA cm?2 and shows a negligible overpotential rise after chronopotentiometry test in 1.0 M KOH. The cost-effective hybrid approach reported in this work could be extended to other hybrid systems, and this excellent electrocatalyst could also be a promising candidate for overall water splitting.
NSTL
Elsevier