Oxygen defect based Cobalt-doped-NiMoO4 Hierarchical hollow nanosheet-based-nanosphere for oxygen evolution reaction

The synergistic effect between Co, Ni and Mo makes the Co–NiMoO 4 HNS have a better performance and stability. Thus, Co–NiMoO 4 HNS exhibits a favorable catalytic performance toward OER with an overpotential of 270 mV.