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.; Vertova, A.

Abstract

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.

Citation

Rondinini, S., Aricci, G., Krpetic, Z., Locatelli, C., Minguzzi, A., Porta, F., & Vertova, A. (2009). Electroreductions on silver-based electrocatalysts : the use of Ag Nanoparticles for CHCl3to CH4Conversion. Fuel Cells, 9(3), 253-263. https://doi.org/10.1002/fuce.200800083

• Journal Article Type: Article
• Publication Date: Jan 1, 2009
• Deposit Date: Oct 11, 2016
• Journal: Fuel Cells
• Print ISSN: 1615-6846
• Publisher: Wiley
• Volume: 9
• Issue: 3
• Pages: 253-263
• DOI: https://doi.org/10.1002/fuce.200800083
• Publisher URL: http://dx.doi.org/10.1002/fuce.200800083
• Related Public URLs: http://onlinelibrary.wiley.com/doi/10.1002/fuce.200800083/pdf
• Additional Information: Funders : MUR–The University of Milan;Fondazione Cariplo; Projects : FIRSTfunds;Materiali Nanostrutturati a BaseMetallica per la Catalisi