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Electrochemical and In Situ FTIR Study of o-Cresol on Platinum Electrode in Acid Medium

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Abstract

The electrochemical behaviour of o-cresol in acidic medium on platinum electrode has been studied by cyclic voltammetry and in situ Fourier transform infrared spectroscopy. The o-cresol suffers hydrolysis during oxidation giving rise to the formation of methyl-p-benzoquinone. In situ FTIR spectroscopic studies also reveal the presence of CO2, formed as a consequence of the rupture of the aromatic ring. Moreover, the oxidation of o-cresol in acidic medium produces a polymeric film on the platinum surface that precludes further oxidation of o-cresol. The reduction of o-cresol at potentials below 0 V produces in the first step the partial reduction of the aromatic ring and when the potential goes to values below 0 V, methyl-cyclohexanone.

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Acknowledgments

Financial support by the Ministerio de Economía y Competitividad and FEDER (MAT2010-15273) and Generalitat Valenciana (PROMETEO/2013/038) projects is gratefully acknowledged. The authors thank Prof. J.M. Sansano from Organic Chemistry Department of Alicante University for his fruitful discussion.

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Correspondence to E. Morallon.

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Taleb, Z., Montilla, F., Quijada, C. et al. Electrochemical and In Situ FTIR Study of o-Cresol on Platinum Electrode in Acid Medium. Electrocatalysis 5, 186–192 (2014). https://doi.org/10.1007/s12678-013-0182-x

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