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Radiation effects on platinum nanostructured electrocatalysts for polymer electrolyte fuel cells

TitleRadiation effects on platinum nanostructured electrocatalysts for polymer electrolyte fuel cells
Publication TypePresentazione a Congresso
Year of Publication2008
AuthorsCemmi, A., Paoletti C., Pozio A., Baccaro S., Giorgi L., and Serra Emanuele
Conference NameAstroparticle, Particle and Space Physics, Detectors and Medical Physics Applications - Proceedings of the 10th Conference
Conference LocationComo
Keywordscarbon, Characterization, Cyclic voltammetry, Electrocatalysts, Electrochemical electrodes, Electrochemical performance, Electronic application, Free radicals, Fuel cells, Galvanostatic techniques, High power density, Nanostructured electrocatalysts, Platinum, Platinum electrocatalysts, Platinum nano-particles, Polyelectrolytes, Polymer electrolyte fuel cells
Abstract

Polymer Electrolyte Fuel Cells (PEFCs) offer low weight and high power density and are being considered for automotive and stationary power production besides space and electronic applications. In this work, gamma radiation effects on carbon materials (carbon powder and multi walled carbon nanotubes) used as substrates in PEFCs electrodes, were studied. The enhancing of free radicals formation (especially on carbon powder) was observed and studied by EPR spectroscopy. This evidence leads to a significant activation of carbon materials because paramagnetic sites represent the preferential position for platinum electrocatalyst nucleation. Galvanostatic techniques were applied to deposits platinum nanoparticles on carbon substrates while FEG-SEM characterization and cyclic voltammetry (CV) were carried out to study the morphology and the electrochemical performances of PEFCs electrodes.

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84885934492&partnerID=40&md5=eec8d9e164f0e1e183a4758bf8366dbe
Citation KeyCemmi2008540