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(A) CV of our CPE/BSA in p-nitrophenol solution (0.8 mM, CBS), when different negative potentials were applied: (a) −0.7, (b) −0.8, (c) −0.9, (d) −1.0, and (e) −1.1 V. Scan rate, 100 mV·s–1. (B) Expanded dotted area of (A). (C) Electrochemical reduction mechanism of p-nitrophenol.
