Fig. 2: Evaluation of electrocatalytic OER performance.

a Polarization curves with iR correction in 1.0 M KOH. b Overpotentials comparison at different current densities. c Tafel plots. d CP curves of CoCe–O–Ir and IrO2 without iR correction at 500 mA cm–2. e Schematic of the AEMWE configuration. f Durability cell voltage-time curve for seawater splitting without iR correction. The RT in (f) represents room temperature. Source Data are provided as a Source Data file.