Electrochemistry of Prussian Blue Modified Electrodes: An Electrochemical Preparation Method

Abstract

A new type of Prussian blue modified electrode is described. The Prussian blue modified electrode is electrochemically prepared in a solution of ferric‐ferricyanide. The amount of Prussian blue on electrodes such as platinum, glassy carbon, and SnO2 is easily controlled by changing the current density, the electrode potential, and the time of the electrolysis. The waves observed at +0.2 and +1.0V vs. SCE are due to the reduction and the oxidation of the ferric part and of the ferrous part in the Prussian blue crystal, KFeIIIFeII false(CN)6 or Fe4IIIfalse[FeII false(CN)6]3 , respectively. This electrode exhibits excellent stability in aqueous solution. A spectroelectrochemical property of the modified electrode is also described.

Prussian Blue based screen printed biosensors with improved characteristics of long-term lifetime and pH stability

“…The deposition of PB on different substrates is usually accomplished by the electrochemical reduction of an equimolar mixture of ferric and ferricyanide ions (Itaya et al, 1982(Itaya et al, , 1984Chi and Dong, 1995;Karyakin et al, 1998;Zhang et al, 1999;Garjonyte and Malinauskas, 2000). In addition, non-electroplating methods can be applied (Neff, 1978;Weibenbacher et al, 1992;Zakharchuk et al, 1995;Garjonyte and Malinauskas, 1998), but in this case they seem to be highly dependent from the nature of the substrate surface itself (Itaya et al, 1982).…”

“…In addition, non-electroplating methods can be applied (Neff, 1978;Weibenbacher et al, 1992;Zakharchuk et al, 1995;Garjonyte and Malinauskas, 1998), but in this case they seem to be highly dependent from the nature of the substrate surface itself (Itaya et al, 1982).…”

“…This growing interest was due to the peculiar characteristic of the reduced form of PB, Prussian White, to catalyse the reduction of H 2 O 2 (Neff, 1978;Itaya et al, 1982) at low applied potential, around 0.0 V versus Ag/AgCl. In this way, the effect of the most common electrochemical interfering species is avoided or greatly reduced.…”

“…The inorganic nature of PB and its low cost makes it more suitable than HRP in assembling modified biosensors. PB modified glassy carbon (Itaya et al, 1984;Karyakin et al, 1996Karyakin et al, , 1998, graphite (Chi and Dong, 1995;Jaffari and Turner, 1997;Deng et al, 1998), carbon paste (Garjonyte and Malinauskas, 1998) and platinum (Itaya et al, 1982) electrodes have been studied, leading to the construction of glucose (Karyakin et al, 1995;Garjonyte and Malinauskas, 2000), lactate (Garjonyte et al, 2001), glutamate (Karyakin et al, 2000), aminoacid (Chi and Dong, 1995) and alcohol (Karyakin et al, 1996) biosensors. Recently, a review on the analytical applications of PB has appeared in literature (Karyakin, 2001).…”

Morphological characterization and analytical application of poly(3,4-ethylenedioxythiophene)–Prussian blue composite films electrodeposited in situ on platinum electrode chips

“…The chemical formulations of PB, referred to as "water insoluble PB", Fe 4 III [Fe II (CN) 6 ] 3 i.e. without potassium, and "water soluble PB", KFe III [Fe II (CN) 6 ], respectively, were used to describe the formation of PB [20].…”