Voltammetric Comparison of the Electrochemical Oxidation of Toluene on Monolithic and Reticulated Glassy Carbon Electrodes in Aqueous Medium

 

Cornelio R. Martínez, Reynaldo L. Ortiz*

Universidad de los Andes, Facultad de Ciencias, Departamento de Química, Laboratorio de Electroquímica, Mérida 5101-Venezuela

 

DOI: 10.4152/pea.201006397

 

Abstract

The electrochemical oxidation of toluene in aqueous-acid medium was studied on monolithic and reticulated glassy carbon electrodes using cyclic voltammetry. The oxidation potential was 1.7 V for both electrodes. However, the normalized oxidation currents were higher on reticulated glassy carbon, showing more catalytic activity than on the monolithic glassy carbon. To normalize the obtained anodic current values, a method for the determination of the electrodes effective area was used, which consists in the underpotential deposition of a copper monolayer.

Keywords: electrochemical oxidation, toluene, aqueous-acid medium, monolithic and reticulated glassy carbon, effective area.

 

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Acknowledgments

This project was supported by CDCHTA-ULA under project C-1596-08-08-B.

The authors also are grateful for support received from FONACIT (Misión Ciencia) and Departamento de Química de la Universidad Experimental Francisco de Miranda, Republica Bolivariana de Venezuela.

 

* Corresponding author. E-mail address: reynaldo@ula.ve

Received 24 June 2010; accepted 7 December 2010