2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 2. Amatore Intl. Symp. / on Electrochemistry for Sustainable Development
| Editors: | F. Kongoli, H. Inufasa, M. G. Boutelle , R. Compton, J.-M. Dubois, F. Murad |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2018 |
| Pages: | 216 pages |
| ISBN: | 978-1-987820-84-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Electrocatalysis in PEM-FC Reactions: The Influence of the Architectural Disposition of Elements on Surface Adsorption Site Electronic Condition
Francielle Bortoloti1; Maria Laura Dellacosta1; Nicolas Ishiki1; Beatriz Keller1; Kleper Rocha1; Antonio Angelo1;1UNESP, Bauru, Brazil;
Type of Paper: Regular
Id Paper: 224
Topic: 47
Abstract:
Any approach of an energy planning program based on the sustainable development concept should consider the use of Proton Exchange Membrane Fuel Cells (PEM-FC). These electrochemical devices can be easily inserted in an Energy-production and distribution net because of their low pollution, portability, high efficiency, and wide range application characteristics [1-2]. However, PEM-FC still demands some improvements to decrease the production and operational costs and increase the efficiency for some fuels oxidation reactions. In this perspective, the development of new and more efficient electrocatalysts for fuel oxidation reactions has been considered a priority worldwide. Nevertheless, the development or improvement of electrocatalysts is limited by the lack of appropriated knowledge on materials activity. In this work, the authors present the study performed on the influence of the architectural disposition of metal elements in the geometric structure of electrode materials, and the resulting performance towards the anode reaction. We synthesized and fully characterized materials in the systems Pt-Sn and Pt-Ni— structured as ordinary alloy, ordered intermetallic, and core-shell nanoparticles— in the same metal proportion 1:1 (Pt:M), and evaluated them as anode for the eletrooxidation of hydrogen, methanol, ethanol, ethyleneglycol and glycerol fuels. It was concluded that, despite the same chemical composition and particle size, the electronic density of the Pt surface adsorption site is deeply affected by the energy of interaction with the foreign metal (Sn or Ni). Therefore, the structure as the nanoparticle crystallizes will influence the adsorptive characteristic of the anode material, thus determining the performance as efficient electrode material for the electrooxidation of a given fuel.
Keywords:
Catalysis; Electrochemical devices; Electrochemistry; Nanocrystals;References:
[1] VIELSTICH, W.; LAMM, A.; GASTEIGER, H.A. Handbook of Fuel Cells: Fundamentals, Technology, and Applications. v.1, New York: Wiley. 2003.[2] KORDESCH, K.; SIMADER, G. Fuel cells and their applications. Weinheim: Whiley-VCH. 1996.