Electrochemical formation of Prussian blue films with a single ferricyanide solution on gold electrode

Development of an amperometric glucose biosensor based on the immobilization of glucose oxidase in an ormosil-PVA matrix onto a Prussian Blue modified electrode

“…However, the second peak slightly decreased in the potential range of 0.6-1.2 V. When the scan potential range (−0.2 to 1.2 V) was selected, considerable peak current decrease for both peaks were observed. This behavior is a typical response for PB films as reported in previous studies [40,41] due to the oxidation (PB→PY) and continuous dissolution of the PB film. Therefore, in order to keep the long-term stability of PB film, a suitable potential scan range of −0.2 to 0.6 V was selected.…”

Rapid electrochemical preparation of a compact and thick Prussian blue film on composite ceramic carbon electrode from single ferricyanide solution in the presence of HAuCl4

“…The gold disk electrode (d. 1 mm), glass carbon electrode (d. 3 mm), and platinum disk electrode (d. 1 mm) were treated as previously before to use [41]. Carbon paste electrode (d. 3 mm) was prepared by mixing certain amounts of graphite powder and paraffin liquid and packing this mixture into a 3 mm diameter PVC tube, and polished with weighing paper carefully before to use.…”

“…The experiment conditions played vital roles in the MHCF electrochemical deposition process [41], which including pH, kinds and concentration of supporting electrolyte, concentration of ferricyanide and metal ion, and potential sweeping range. In our present work, these experiment conditions were investigated by comparing the surface coverage value (C T ) of PB (deposited 20 cycles between À0.2 and 0.9 V) obtained from cathodic peak at 0.19 V on cyclic voltammogram in 0.50 mol L À1 K 2 SO 4 .…”

“…Recently, deposition of PB on the substrate surface from a single acidic ferricyanide solution has been reported [38][39][40][41]. Koncki et al [38] deposited the PB film on the polystyrene cuvettes from the K 3 Fe(CN) 6 in 1 mol L À1 HCl solution.…”

“…Yang et al [39] reported a method of preparation of PB from a single ferricyanide solution in a weak acidic medium (pH 3.6) of KH 2 PO 4 (0.1 mol L À1 ) -HCl by using cyclic voltammetry between À0.2 and 0.6 V. They thought that the formation of PB from the ferricyanide solution lied in the dissociation of ferricyanide ions. Zhang et al [40] reported the electrochemical preparation of PB film on the gold disk electrode from single acid ferricyanide solution (pH 1.6) by using cyclic voltammetry between À0.2 and +0.9 V. Abbacyspour et al [41] reported the effects of experimental conditions on the electrodeposition of PB on the gold electrode from single acid ferricyanide solution. In these works, the gold electrode was usually used as a substrate to electrochemically deposit PB.…”