Manganese–Schiff base complex immobilized silica materials for electrocatalytic oxygen reduction |
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Authors: | Vellaichamy Ganesan Manas Pal Manoj Tiwari |
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Affiliation: | 1. Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi, 221 005, India
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Abstract: | Curtailment of platinum catalysts loading in fuel cell is a recent central issue. As substitutes, these days several organic metal chelate compounds having featured moieties of M–N4 or M–N2O2 (M = transition metal ion) are being used as cathode catalysts in fuel cells. Here, in this study, we report in detail the electrocatalytic activity of manganese–Schiff base complexes for oxygen reduction reaction in 0·05 M HClO4 at room temperature. Actually, Mn(salen)]+: N,N′-bis(salicylaldehyde) ethylenediimino manganese(III)]+ and Mn(salophen)]+: N,N′-bis(salicylaldehyde)-1,2-phenylenediimino manganese(III)]+ were introduced into/onto the MCM-41 type silica spheres and used for the electrocatalytic reduction of oxygen. Synthesized materials were characterized by UV–Vis, FT–IR and electrochemical techniques. Significant low overpotential for oxygen reduction in 0·05 M HClO4 on Mn(salen)]+- and Mn(salophen)]+-incorporated silica-modified glassy carbon electrodes was observed. |
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