One of the research lines of the group "New Technological Development in Electrochemistry: Sonoelectrochemistry and Bioelectrochemistry" at Alicante University is Sonoelectrochemistry, it means, the study of chemical processes under electrical and ultrasound fields. In this research we are developing not only the design and characterization of sonoelectrochemical reactors but also general aspects of the sonoelectrochemical processes from a fundamental and applied point of view. It is very important to characterize the behaviour of sono(electrochemical)reactors in order to identify accurately the actives zones, especially those related to the cavitation events. Different chemical dosimeters, such as Fricke reaction and iodide oxidation, have been used in order to determined the global generation of hydroxyl radicals developed during the water sonolysis. A new electrochemical probe (lead dioxide electrodeposition) has been proposed for the local hydroxyl radical level. Theoretical characterization by means of numerical simulations have been also carried out in order to characterize the ultrasonic field propagation and to obtain the spatial distribution of the mechanical effect derived from it. The results are in agreement with those obtained with different classical physical methods (calorimetry method, aluminium foil erosion, thermal probes and an electrochemical probe based on Fe(CN)₆^3- anion reduction). Processes like the lead dioxide electrocrystallization have been studied from a mechanistic point of view, and it has been observed that the kinetic parameters are strongly modified by ultrasound. Applied studies have been also carried out analyzing the effect of an ultrasound field in the electrochemical degradation of aqueous solutions of chlorinated organic compounds, such as perchloroethylene, a solvent widely used in the industry. Different collaborations have been also carried out inside of COST D32 action: -Electrochemical nitration and chlorination of bioactive species (enzymes, protein redox and antibodies,) with Dr. John Heptinstall (Coventry University). -Perchloroethylene degradation at high frequency, with Prof David Walton (Coventry University). -Sonoreactor characterization, with Dr. J. Klima (J. Heyrovsky Institute of Physical Chemistry. Czech Republic) -Electrosynthesis of hydrogen peroxide assisted with ultrasound, with Prof Richard Compton (Oxford University). The authors would like to thank the COST D32 and Generalidad Valenciana for its financial support (Project GV05/104). J.I. gratefully acknowledges the Spanish Programme Ramon y Cajal.

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