Electrochemical and spectroscopic investigation of prussian blue modified electrodes containing isonicotinamide

✍ Scribed by Flavio M. Matsumoto; Marcia L.A. Temperini; Henrique E. Toma

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 560 KB
• Volume: 39
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(94)80077-4

✦ Synopsis

Prussian blue modtied electrodes derived from Fe[Fe(CN),adpy] (adpy = lsomcotmanude) exh&nt reversible electrochemical waves at E,,, = 045 and 1 1 V vs she, ascribed to the Fe""" and [Fe(CN),adpy]2-'3-redo x couples, respectively Reversible electrochronnc behavior IS observed below 0 7V, associated wth the nse and decay of the intervalence band at 775~11 The resonance Raman spectra of the moddied electrodes are dominated by the vibrational peaks of the lsomcotmarmde hgand, m contrast, the SERS spectra exlublt only metal-CN wbrational peaks, suggesting an adsorption meehamsm mvolvmg the cyanide hgands The electrodes based on the Ni,[Fe(CN),adpy], analogue extuht reversible waves at 0 5 and 0 7 V, ascribed to [Fe(CN),adpy]3-species located m non-equivalent sites These sites exhiht a contrasting response for K+ and Na+ ions Kev words mod&d electrodes, Prussian blue electrodes, electrochromlsm. mixed-valence