fig4

Figure 4. (A) XRD patterns of various samples. (B) LSV polarization curves of different catalyst electrodes for the OER in 1.0 M KOH. (Reproduced with permission^[61]. Copyright 2022, Springer). (C) Schematic diagram of HEO-Origin preparation. (D) TEM image and (E) SAED patterns of HEO-Origin. (Reproduced with permission^[63]. Copyright 2023, Elsevier). (F) Schematic diagram of the synthesis of La₂O₃@NP-NS. (G) SAED pattern of La₂O₃@NP-NS. (Reproduced with permission^[64]. Copyright 2020, Springer). (H) Overpotential bar graph and (I) Tafel plot of different catalyst electrodes. (Reproduced with permission^[49]. Copyright 2023, Wiley-VCH GmbH).