Tuning the high-entropy perovskite as efficient and reliable electrocatalysts for oxygen evolution reaction

This work reports a high-entropy perovskite La 0.3 Sr 0.7 (CrMnFeCoNi) 0.2 O 3 as a high-performance OER electrocatalyst. Sr doping induces the formation of higher-valence Cr 6+ , Mn 4+ , Fe 4+ , Co 4+ and Ni 3+ responsible for the excellent OER activity.