Abstract
The electropolymerization of phenothiazine derivative, methylene blue (MB), on the surface of a basal plane highly oriented pyrolytic graphite (HOPG) was studied. Highly oriented pyrolytic graphite electrodes modified with the polymeric methylene blue (HOPG/pMB) was prepared by potential cycling in aqueous electrolyte solution containing a dissolved monomeric form of MB. The electrocatalytic activity of the electrode toward hydrogen sulfide was examined. In the presence of hydrogen sulfide, a new oxidation peak at potential about +0.340 V (vs. SCE) has arisen. No current signals corresponding to the hydrogen sulfide oxidation are observed in the absence of pMB on the electrode surface.
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References
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Acknowledgements
The authors are grateful for the financial support by the Grant Project SVV260440 and Progres Q46 of Charles University.
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Zlámalová, M., Janda, P. & Nesměrák, K. Hydrogen sulfide detection by poly(methylene blue) modified highly oriented pyrolytic graphite electrode. Monatsh Chem 148, 1595–1597 (2017). https://doi.org/10.1007/s00706-017-1996-7
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DOI: https://doi.org/10.1007/s00706-017-1996-7