Fig. 4
From: Non-noble metal-nitride based electrocatalysts for high-performance alkaline seawater electrolysis
Overall seawater splitting performance. a Schematic illustration of an overall seawater splitting electrolyzer with NiMoN and NiMoN@NiFeN as the cathode and anode, respectively. b Polarization curves after iR compensation of NiMoN and NiMoN@NiFeN coupled catalysts in a two-electrode electrolyzer tested in alkaline simulated (1 M KOH + 0.5 M NaCl, resistance: ~1.1 Ω) and natural seawater (1 M KOH + Seawater, resistance: ~1.2 Ω) electrolytes under different temperatures. c Comparison between the amount of collected and theoretical gaseous products (H2 and O2) by the two-electrode electrolyzer at a constant current density of 100 mA cm−2 in 1 M KOH + 0.5 M NaCl at 25 °C. d Durability tests of the electrolyzer at constant current densities of 100 and 500 mA cm−2 in different electrolytes at 25 °C. e Schematic illustration of the principle for power generation between the hot and cold sides of a TE device. f Real-time dynamics of current densities for the electrolyzer in 1 M KOH + 0.5 M NaCl at 25 °C driven by a TE device when the temperature gradient (ΔT) between its hot and cold sides is 40, 50, 60, and 40 °C
