fig13

Figure 13. (A) HRTEM image of the NiMoN@NiFeN catalyst after OER tests. Scale bars: 5 nm. (B) Comparison of the OER overpotentials at 100, 500, and 1,000 mA cm^-2 for NiMoN@NiFeN in different electrolytes. (Reproduced with permission^[120]. Copyright 2019, Springer Nature). (C) Structure of the NiFe/NiS_x-Ni; (D) CV scans of a Ni³ anode before and after 1,000 h seawater catalysis in an alkaline simulated seawater electrolyte. (Reproduced with permission^[121]. Copyright 2019, PNAS). (E) The OER polarization curves of Co-Se₁ and Co-Se₄ in seawater. (Reproduced with permission^[122]. Copyright 2018, WILEY-VCH). (F) OER activity of NiFe foam, NiFe foam-OER, NiFeP-NW, NiFeP-NW-OER, and IrO₂/C in alkaline simulated seawater. (Reproduced with permission^[123]. Copyright 2021, Elsevier).