Investigation of H(2)O(2) Electrochemical Behavior on Ferricyanide-Confined Electrode Based on Ionic Liquid-Functionalized Silica-Mesostructured Cellular Foam

In this work, ionic liquid (IL) of 1-propyl-3-methyl imidazolium chloride-functionalized silica-mesostructured cellular foam (MCF) was prepared. The obtained MCF-IL was used to construct the Fe(CN)(6)(3−)-confined electrode (MCF-IL-Fe(CN)(6)(3−)/PVA) and H(2)O(2) electrochemical behavior on the electrode was investigated. It was found that H(2)O(2) was oxidized on the freshly prepared electrode while catalytically electro-reduced on the acid pretreated one. Cyclic voltametric results revealed that the real catalyst for catalytic reduction of H(2)O(2) was Prussian blue (PB) rather than Fe(CN)(6)(3−). The electrocatalytic ability of the acid-pretreated MCF-IL-Fe(CN)(6)(3−)/PVA electrode offered a wide linear range for H(2)O(2) detection. The present study on H(2)O(2) electrochemical behavior on an MCF-IL-Fe(CN)(6)(3−)/PVA electrode might provide useful information for further developing integrated Fe(CN)(6)(3−)-mediated biosensors as H(2)O(2) is extensively involved in the classic reaction containing oxidase enzymes.