fig5

From: Corrosion-induced surface reconstruction enhances RuO₂/NiFe(OH)_x for efficient hydrogen evolution reaction

Corrosion-induced surface reconstruction enhances RuO<sub>2</sub>/NiFe(OH)<i><sub>x</sub></i> for efficient hydrogen evolution reaction

Figure 5. (A) Schematic diagram of the assembled water-splitting electrolyzer; (B) Polarization curves of NFF and NiFe(OH)_x electrodes for OER; (C) A comparative study on the OER overpotentials at the current densities of 50 mA cm^-2 and 100 mA cm^-2; (D) Polarization curves of NiFe(OH)_x‖RuO₂/NiFe(OH)_x and NFF‖NFF-based water-splitting devices; (E) Chronopotentiometry curves of the NiFe(OH)_x‖RuO₂/NiFe(OH)_x electrolyzer under the constant current densities of 100 mA cm^-2 and 200 mA cm^-2 (inset: the photo of water-splitting device operating at 200 mA cm^-2). NFF: NiFe foams; HER: hydrogen evolution reaction; OER: oxygen evolution reaction; RHE: reversible hydrogen electrode.