Investigation of H2O2 Electrochemical Behavior on Ferricyanide-Confined Electrode Based on Ionic Liquid-Functionalized Silica-Mesostructured Cellular Foam
2022
Ling Zhang | Zhenkuan Ma | Yun Fan | Songlin Jiao | Zhan Yu | Xuwei Chen
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&minus:-confined electrode (MCF-IL-Fe(CN)63&minus:/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&minus:. The electrocatalytic ability of the acid-pretreated MCF-IL-Fe(CN)63&minus:/PVA electrode offered a wide linear range for H2O2 detection. The present study on H2O2 electrochemical behavior on an MCF-IL-Fe(CN)63&minus:/PVA electrode might provide useful information for further developing integrated Fe(CN)63&minus:-mediated biosensors as H2O2 is extensively involved in the classic reaction containing oxidase enzymes.
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