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Figure 2

(a) Nyquist plots of TNT, Co-TNT, Black TNT, and Co-Black TNT. Nyquist plots were obtained in the frequency range of 200 kHz to 0.1 Hz. (b) Mott–Schottky plots in electrochemical impedance spectroscopy. The Mott–Schottky plots were measured at a fixed frequency of 200 kHz in aqueous NaClO4 solution (0.1 M).

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