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Figure 4. (A) Polarization curves and (B) comparison of overpotentials at different current densities of 100, 200 and 300 mA cm-2 of P-NiFe@NiMoO4 electrode tested in different electrolytes. (C) Overall seawater spilling polarization curves in different electrolytes. Inset illustrates the overall two-electrode seawater splitting electrolyzer that paired P-NiFe@NiMoO4 with P-NiMoO. (D) Comparison between the amount of collected and theoretical gaseous products (H2 and O2) by the two-electrode electrolyzer at a constant current density of 40 mA cm-2 in 1 M KOH + seawater at 25 °C. (E) Durability tests of electrolyzer at a constant current density of 100 mA cm-2 in 1 M KOH + seawater at 25 °C. (F) Raman spectra of P-NiFe@NiMoO4.
