Remarkable Electrochemical Responses of Ferrocene/NaY Zeolite Composite modified Electrode Based on Hydrophobic Ionic Liquid

Abstract

The ferrocene/NaY zeolite composites (Fc/NaY) are introduced on the surface of a glassy carbon electrode together with the hydrophobic ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF 6 ). The modified electrode thus constructed exhibits a pair of reversible redox peaks corresponding to ferrocene. Additionally the peak separation remains almost constant (58 -75 mV) and the value of the ratio i pa /i pc is close to 1 for scan rates in the range from 10 to 1000 mV s À1. The effects of the scan rate, aqueous supporting electrolytes, hydrophobic ionic liquid and the contents of ferrocene encapsulated by electrochemistry are investigated. The extrazeolite electron transfer process is discussed. Furthermore, the Fc/NaY/IL-modified electrode shows good mediation towards oxidation of ascorbic acid, dopamine, hydroquinone, and catechol.

A review on electrodes modified with ionic liquids

“…They range from fullerenes [75], surfactants [76][77][78][79] and phospholipids [80] to polymeric structures like Nafion [27,[81][82][83], silicate [32,84], mesocellular silicate foams [85], Teflon [9], Nafion -silicate composite [86] zeolites [87], hydroxyapatite [88] and clays [89,90]. Quite often, polysaccharides like chitosan [91][92][93][94][95], gelatin [96], hyaluronate [97,98], gellan gum [99,100], konjac glucomannan [81] and agarose -Nafion composite [101] were applied as matrix for IL.…”