fig14

Figure 14. (A) XRD patterns of Ni₂Fe-LDH/FeNi₂S₄/NF and post-Ni₂Fe-LDH/FeNi₂S₄/NF. (B) The OER LSV curves of five different samples in 1.0 M KOH + 0.5 M NaCl. (Reproduced with permission^[127]. Copyright 2022, WILEY-VCH). (C) The OER polarization curves of NiFe-PBA-gel-cal and FeFe-PBA-gel-cal in alkaline freshwater and alkaline simulated seawater. (D) The XPS spectra of Ni 2p in NiFe-PBA-gel-cal before and after OER tests. (Reproduced with permission^[128]. Copyright 2022, WILEY-VCH). (E) Polarization curves of NCFPO/C@CC in the KOH and NaCl + KOH electrolytes. (Reproduced with permission^[129]. Copyright 2019, American Chemical Society). (F) HAADF-STEM image of Cr₂O₃-CoO_x. (G) Measured pH values on CoO_x and Cr₂O₃-CoO_x anode surfaces at different potentials. (H) OER LSV curves of 6 at% Cr₂O₃-CoO_x, CoO_x, Fe-doped NiOOH and RuO₂ catalysts in seawater. The inset shows the durability test of the 6 at% Cr₂O₃-CoO_x anode. (I) The Schematic diagram of local alkaline microenvironment generation of Lewis acid modified anode. (Reproduced with permission^[130]. Copyright 2023, Springer Nature).