Fig. 7: Electrochemical performances of LaIr-Co₃O₄ on PEMWE devices.

Assembly (a) and disassembly (b) photos of the commercial PEM electrolyzer. c Polarization curves (without iR compensation) of the PEM electrolyzer with Ir-Co₃O₄, LaIr-Co₃O₄ and c-IrO₂. d Durability test of LaIr-Co₃O₄, Ir-Co₃O₄ and c-IrO₂ in the PEM-WE electrolyzer.