Synergistic Multimetal Effects in a High-Entropy Perovskite Oxide Anchored on Reduced Graphene Oxide for Accelerated Water Oxidation

. The catalyst also demonstrates good stability during 8 h of continuous operation. The enhanced performance is attributed to the combined effect of multiple metal elements in the high-entropy lattice, improved charge transport through the rGO network, and the presence of many active sites created by surface defects. These results show that combining HEOs with conductive carbon materials is a useful strategy for developing efficient and durable electrocatalysts for the OER.