Characterization of self-assembled monolayers of iron and cobalt octaalkylthiosubstituted phthalocyanines and their use in nitrite electrocatalytic oxidation |
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Authors: | Fungisai Matemadombo |
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Affiliation: | Rhodes University, Department of Chemistry, PO Box 94, 6140 Grahamstown, South Africa |
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Abstract: | Cobalt and iron phenylthiosubstituted phthalocyanines have been deposited on Au electrode surfaces through the self-assembled monolayer (SAM) technique. The so formed layers were studied using voltammetric and impedance techniques. These SAMs blocked a number of Faradic processes and electrocatalyzed the oxidation of nitrite. The electrocatalytic parameters of the cobalt and iron phenylthiosubstituted phthalocyanines deposited on Au electrodes in nitrite solution were studied. Nitrite overpotentials which are lower than ever reported were obtained in this work for the iron phenylthiosubstituted phthalocyanines with very high stability. |
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Keywords: | Cobalt phthalocyanine Iron phthalocyanine Self-assembled monolayer Cyclic voltammetry Impedance spectroscopy Electrocatalysis Nitrite oxidation Kinetics |
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