Figure 5.

a) Polarization curves of the CoP@a‐CoOx plate/C||CoP@a‐CoOx plate/C system, the Pt/C(−)||IrO₂/C(+) system, and the C/Carbon cloth||C/Carbon cloth system for overall electrochemical water splitting in a 1 m KOH solution with an individual electrode mass loading of 5 mg cm⁻²; obtained using a 5 mV s⁻¹ scan rate. b) Chronopotentiometric (potential versus time) plot of electrochemical water splitting using the CoP@a‐CoOx plate/C||CoP@a‐CoOx plate/C at a constant current density of 10 mA cm⁻² in a 1 m KOH solution. Inset: a representative photograph of water‐splitting device.