Figure 5: (a) Typical cyclic voltammograms of Hb/Mn2O3-Ag nanofibers/glassy carbon electrode at different scan rates. The voltammograms (from inner to outer) designate scan rates of 50, 100, 200, 300, 400, and 500 mV s−1, respectively. (b) Dependence of the anodic and cathodic peak currents on the scan rates the red line is cathodic and the blue line is anodic. (c) Relationship between the peak potential ( ) and the natural logarithm of scan rate ( ) for Hb/Mn2O3-Ag nanofibers/glassy carbon electrode. All the data were obtained at pH 7.0 and in 0.1 M phosphate buffer solution.