Abstract
In this work the use of cavity-microelectrodes is described for the study of the electrocatalytic properties of silver powders in the electroreduction of trichloromethane, taken as model compound. The key role played by the Ag surface status has driven the research towards the use of micro- and nanosized materials, whose exploitation requires the full understanding of the complex behaviour of multiphasial interfaces, and the development of the appropriate investigation methodologies. Moreover, comparison with electrodeposited silver macroelectrodes demonstrates the advantages of using cavity-microelectrodes, especially in terms of improvement of the electrocatalytic activity, insignificance of ohmic drop and double layer capacitance in the voltammetric response, and simplicity offered by the experimental procedure for renovating the electrode material and surface.
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Acknowledgements
The authors thank Professor Salvatore Daniele, University of Venice—Department of Physical Chemistry, for fruitful discussions. The authors also acknowledge Stephan Borensztajn (CNRS—UPR 15) and Dr. Benedetta Sacchi (UMIL—DCFE) for SEM analysis. Financial support of COST (Chemistry Working Group—COST action D29—WG-0006/03: Green Organic Electrochemistry), MUR-The University of Milan (FIRST funds) and Fondazione Monte dei Paschi di Siena are gratefully acknowledged.
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Vertova, A., Barhdadi, R., Cachet-Vivier, C. et al. Cavity microelectrodes for the voltammetric investigation of electrocatalysts: the electroreduction of volatile organic halides on micro-sized silver powders. J Appl Electrochem 38, 965–971 (2008). https://doi.org/10.1007/s10800-008-9507-5
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DOI: https://doi.org/10.1007/s10800-008-9507-5