Ferricyanide immobilized within organically modified MCM-41; application for electrocatalytic reduction of hydrogen peroxide

Abstract

Carbon paste electrode modified with aminated Mobil Catalytic Material Number 41 (MCM-41) was prepared and used for immobilization of K 3 [Fe(CN) 6 ] in acidic medium, and then electrochemical behavior of modified electrode containing ferricyanide was studied in detail, including pH-dependence and scan rate effect. Cyclic voltammetry studies showed that the electrode reaction is a surface-controlled process at the scan rate range from 5 to 60 mV s −1 . Also, the electrocatalytic behavior of modified electrode toward the reduction of H 2 O 2 is reported and the effect of pH on catalytic peak current was discussed. According to experimental results, with increasing solution pH, the catalytic effect of this modified electrode is decreased. Catalytic reduction current of H 2 O 2 increases linearly with its concentration. It has been demonstrated that ferricyanide immobilized on the aminated MCM-41 is a stable catalyst for the electrocatalytic reduction of H 2 O 2 .

Investigation of H2O2 Electrochemical Behavior on Ferricyanide-Confined Electrode Based on Ionic Liquid-Functionalized Silica-Mesostructured Cellular Foam

“…However, Xia et al and Yang et al reported that Fe(CN) 6 3− was unstable in acidic conditions [34,35]. Thus, the acid pretreatment experiment for the MCF-IL-Fe(CN) [20]. By comparing the differences in cyclic voltametric responses of H 2 O 2 on the freshly prepared MCF-IL-Fe(CN) 6 3− /PVA electrode and the acid-pretreated one, it can be seen that the acid treatment greatly affected the characteristics of the electrode.…”

“…Imidazolium-based ILs are one of the most popular ionic liquids because of their inherent properties and tunable nature. Compared with the commonly used groups (-NH 2 , -R-NH 4 + ) for Fe(CN) 6 3− confinement [14,20,21], imidazolium-based ILs have recently attracted considerable attention because the strong interaction between the imidazolium moieties and Fe(CN) 6…”

“…It can be seen that the treated electrode still presented a pair of reductiveoxidative peaks in absence of H 2 O 2 (curve a). With addition of H 2 O 2 , the reductive peak current increased and the oxidative peak current decreased (curves b and c), indicating the occurrence of electroreduction of H 2 O 2 on the electrode[20]. By comparing the differences in cyclic voltametric responses of H 2 O 2 on the freshly prepared MCF-IL-Fe(CN)6 3− /PVA electrode and the acid-pretreated one, it can be seen that the acid treatment greatly affected the characteristics of the electrode.It has been demonstrated that Fe(CN) 6 3− could decompose in acidic conditions and generate PB on the electrode surface[34,35].…”

Preparation and Characterization of Organically Modified MCM-48 as Heterogonous Catalyst for Oxidation of Sulfides and Thiols

“…Apply modified-MCM-48 as catalyst has advantages like high stability under severe condition such as high temperature and organic solvent and easy separation process [1][2][3][4][5][6]. The surfaces of the MCM-48 have a large number of silanol groups that reaction with various alkoxysilanes by covalent grafting for manufacture functionalized MCM-48 [7]. Schiff bases are condensation products of primary amines and carbonyl compounds (also known as imine or azomethine).…”