Fig. 6

(a) LSV curves, (b) Overpotential required for j = 10 mA cm−2, (c) Tafel slope plots (d) EIS spectra for NiCoO2/NiCo@C, CoNi PBA, NiO@C and pure Co, (e) Cdl to characterize the electrochemically active area for the four catalysts.

(a) LSV curves, (b) Overpotential required for j = 10 mA cm−2, (c) Tafel slope plots (d) EIS spectra for NiCoO2/NiCo@C, CoNi PBA, NiO@C and pure Co, (e) Cdl to characterize the electrochemically active area for the four catalysts.