Figure 3.
CV of (A) vanillic acid, (B) catechol, (C) caffeic acid, and (D) pyrogaloll at C-CPE, CeO2NP-CPE, NiONP-CPE, and TiO2NP-CPE electrodes. Concentration of 10−4M. Scan rate 100 mV·s−1.
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