Fig. 8
Nyquist plots showing electrochemical impedance studies of CoNiWBO/rGO, (A) in 0.1 M KCl and 40 mM K4[Fe(CN)6] solutions, (B) at sarcosine concentrations of 0.1, 10, 20, 30, 40 and 50 µM in 0.1 M PBS of pH 7.4, and (C) pH of 7.8, 7.6, 7.4, 7.2, 7.0, 6.8 in 0.1 M PBS.
