fig11

Figure 11. (A) LSV responses of different La-doped CoMoO₄ catalysts toward the OER in 1 M KOH; (B) Free energy plots of OER intermediates on the Co-site in the 5% La-CoMoO₄ system under different thermodynamic potentials in alkaline media. This figure is quoted with permission from Arumugam et al.^[106]; (C) XPS spectrum of La-NiFe LDH/NiS/NF La 3d; (D) Polarization curves of different electrodes; (E) Free energy diagram. This figure is quoted with permission from Song et al.^[107]; (F) LSV curves at 10 mA cm^-2 and current densities at 1.6 V of commercial RuO₂, RuO₂, and La_xRu_1-xO₂; (G) Reaction free energy of the acidic OER on RuO₂ and La_0.1Ru_0.9O₂. This figure is quoted with permission from Li et al.^[111]; (H) XPS spectra of O 1s for La₃IrO₇ and La₃IrO₇-SLD; (I) Polarization curves of La₃IrO₇-SLD and commercial IrO₂ at a scan rate of 5 mV s^-1. This figure is quoted with permission from Chen et al.^[112]; (J) Schematic of the PEM electrolyzer device and I-V curves of PEM electrolyzer using La-RuO₂. This figure is quoted with permission from Zhang et al.^[113]. RHE: Reversible hydrogen electrode; NF: nickel foam; LSV: linear sweep voltammetry; OER: oxygen evolution reaction; XPS: X-ray photoelectron spectroscopy; PEM: proton exchange membrane; SLD: surface La-defective.