Figure 3

(A) cyclic voltammograms of CPE in a solution of 0.1 M Fe₃(CN)₆^3−/4− containing 0.3 M KCl at different scan rates with (B) the corresponding scan rate in mVs⁻¹ versus Current in µA with the insert equation describe the value of the slope (0.09 µA s mV⁻¹). (C) the cyclic voltammograms of Ag/CPE modified electrode into a solution of 0.1 M Fe₃(CN)₆^3−/4− containing 0.3 M KCl at different scan rates with (D) the corresponding scan rate in mVs⁻¹ versus Current in µA with the insert equation describe the value of the slope (0.01 µA s mV⁻¹). (E) cyclic voltammograms of 0.1 M Fe₃(CN)₆^3−/4− containing 0.3 M KCl for PAAQ/CPE at different scan rates with (F) the corresponding scan rate in mV s⁻¹ versus peak current in µA with the insert value for the slope (0.01 µA s mV⁻¹). (G) square wave voltammograms of Ag/pAAQ/CPE in a solution of 0.1 M Fe₃(CN)₆^3−/4− containing 0.3 M KCl at different scan rate where (H) the corresponding diagram of scan rate in mV s⁻¹ versus current in µA where the equation for the slope was inserted with a value of 0.55 µA s mV⁻¹. (I) Cyclic voltammograms of a solution of 0.1 M Fe₃(CN)₆^3−/4− containing 0.3 M KCl on Ag/pAAQ/MWCNTs/CPE at different scan rates with (J) the corresponding graph of scan rate in mV s⁻¹ versus peak current values in µA with the insert for the slope value of 3.19 µA s mV⁻¹.