Detection of Selenium and Nickel Metal Ion in Water Using Mn₃O₄-Cn-Modified Electrode

Figure 3

(a) Cyclic voltammetry plot of Pt/Mn₃O₄ and Pt/Mn₃O₄-Cn electrodes in 0.1 M PBS and 5 mM Fe (CN)₆ with scan rate = 100 mV/s. (b) Randle-Sevcik’s plot of anodic peak current versus square root of scan rate 5 to 100 mV/s for (a) bare Pt, (b) Pt/Mn₃O₄, and (c) Pt/Mn₃O₄-Cn in 0.1 M PBS and 5 mM Fe(CN)₆ at 25°C in the range of −500 to 1200 mV.

(a)

(b)