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Investigation of H2O2 Electrochemical Behavior on Ferricyanide-Confined Electrode Based on Ionic
Ling Zhang1, Zhenkuan Ma1, Yun Fan1
1College of Chemistry and Chemical Engineering, Shenyang Normal University of China, Shenyang 110034, China.
Abstract:
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)63--confined electrode (MCF-IL-Fe(CN)63-/PVA) and H2O2 electrochemical behavior on the electrode was investigated. It was found that H2O2 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 H2O2 was Prussian blue (PB) rather than Fe(CN)63-. The electrocatalytic ability of the acid-pretreated MCF-IL-Fe(CN)63-/PVA electrode offered a wide linear range for H2O2 detection. The present study on H2O2 electrochemical behavior on an MCF-IL-Fe(CN)63-/PVA electrode might provide useful information for further developing integrated Fe(CN)63--mediated biosensors as H2O2 is extensively involved in the classic reaction containing oxidase enzymes.
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