Electrodeposition of Hierarchical Nanosheet of NiCo₂O₄/CC as Highly Active and Stable Electrode for Water Oxidation

Figure 7

Electrochemical performance in the oxygen evolution reaction (OER). Electrochemical measurements recorded using a three-electrode configuration in 1 M NaOH. (a) The IR-corrected curve for bare CC, electro-etched CC, NiCo₂O₄/CC-1, NiCo₂O₄/CC-2, and NiCo₂O₄/CC-3. The numbers are referred to as deposition parameter 1 for deposition at -1 V, 2 for -1.3 V, and -1.4 V, all for 6 minutes. (b) Tafel plots calculated from (a). (c) Nyquist plots at the onset potential for each electrode.

(a)

(b)

(c)