Our group used an in-situ exsolution strategy to boost the OER by migrating Fe from the bulk to the surface of perovskite. Significantly enhanced OER activity was achieved on STF and LTF perovskites with surface-decorated oxygen vacancies and Fe nanoparticles. In addition, theoretical calculation confirmed that the oxygen vacancies and Fe nanoparticle on surface could lower the overpotential of OER by facilitating the adsorption of OH-. From this study, migration of the active elements in perovskite is found to be an effective strategy to increase the quantity and activity of active sites, providing new insights and understanding for designing efficient OER catalysts.

The article links:https://www.sciencedirect.com/science/article/pii/S2095495622000572