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Electroreductions on silver-based electrocatalysts : the use of Ag Nanoparticles for CHCl3to CH4Conversion

Rondinini, S., Aricci, G., Krpetic, Ž, Locatelli, C., Minguzzi, A., Porta, F. and Vertova, A. 2009, 'Electroreductions on silver-based electrocatalysts : the use of Ag Nanoparticles for CHCl3to CH4Conversion' , Fuel Cells, 9 (3) , pp. 253-263.

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A preliminary investigation on a new class on electrocatalytic materials for the electroreduction of organic halides is presented and discussed. The electrocatalysts are based on silver nanoparticles (Ag_NP), ad hoc synthesised by chemical reduction of an aqueous silver salt in the presence of six different stabilising agents. The colloids are then supported on carbon powder (10% loading) for further characterisation and use. The electrocatalytic properties of the Ag_NP/carbon composites towards the dehalogenation of halocompounds are tested by cyclic voltammetry and by preparative electrolysis. The hydrodehalogenation of trichloromethane, extensively studied by this group, is selected as a model reaction, because of its relevance for the detoxification of wastes. The voltammetric characterisation is performed in an aqueous solution, supporting the composites on cavity microelectrodes. Gas-diffusion electrodes (GDE) based on the most promising Ag_NP composite – and, for reference, on a commercial Ag/C oxygen reduction electrocatalyst – are then tested in an electrolytic process for the progressive conversion of gaseous trichloromethane to less chlorinated compounds, and ultimately to methane.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences > Biomedical Research Centre
Journal or Publication Title: Fuel Cells
Publisher: John Wiley & Sons, Inc.
ISSN: 1615-6846
Related URLs:
Funders: MUR–The University of Milan, Fondazione Cariplo
Depositing User: Dr Zeljka Krpetic
Date Deposited: 11 Oct 2016 14:42
Last Modified: 11 Oct 2016 14:42

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