fig4

Figure 4. The OWS performance tests. (A) LSV curves of NiFe LDH, Pt_QDs@NiFe LDH-1, Pt_QDs@NiFe LDH, and Pt_QDs@NiFe LDH-5. (B) The overpotentials at 500, 1000 and 1500 mA·cm^-2. (C) LSV curves of Pt_QDs@NiFe LDH (-) || NiFe LDH (+) and Pt/C (-) || RuO₂. (D) The cell voltages at different current densities. (E) Stability tests. (F) Photographs of gas collection at different times. (G) Theoretical and measured gas production at different times. (H) Comparison of the driving voltage of Pt_QDs@NiFe LDH (-) || NiFe LDH (+) with other reported electrocatalysts.