Trimetallic catalyst based on PtRu modified by irreversible adsorption of Sb for direct ethanol fuel cells

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Títol: Trimetallic catalyst based on PtRu modified by irreversible adsorption of Sb for direct ethanol fuel cells
Autors: Figueiredo, Marta C. | Sorsa, Olli | Arán-Ais, Rosa M. | Doan, Nguyet | Feliu, Juan M. | Kallio, Tanja
Grups d'investigació o GITE: Electroquímica de Superficies
Centre, Departament o Servei: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Paraules clau: PtRu catalysts | Antimony | Irreversible adsorption | Direct ethanol fuel cells
Àrees de coneixement: Química Física
Data de publicació: de setembre-2015
Editor: Elsevier
Citació bibliogràfica: Journal of Catalysis. 2015, 329: 69-77. doi:10.1016/j.jcat.2015.04.032
Resum: In this work, PtRu/C–Sb materials prepared by adding a Sb salt to the ink of commercial PtRu/C were studied as catalysts for ethanol oxidation. The prepared trimetallic catalysts showed enhanced properties for ethanol oxidation through a wide range of surface coverages. However, coverage higher than 0.7 of Sb on PtRu/C causes the decrease of the catalytic activity suggesting that specific sites composed of 3 metals are necessary to achieve the highest performance. In situ Fourier Transform Infrared Spectroscopy experiments were also performed to compare the reaction products of the bimetallic and trimetallic catalysts. The catalysts were also tested under fuel cell conditions. Also in this case, higher power densities, higher open-circuit voltages and better stability than the bimetallic substrate were found. With this catalyst preparation method, the catalysts showed 2 times higher current densities than for the PtRu catalysts and 6 times better than for pure Pt anodes.
Patrocinadors: The financial support from Aalto University is acknowledged. This work made use of the Aalto University Nanomicroscopy Center (Aalto-NMC) premises. J.M.F. and R.M.A.A. would like to thank MICINN through Project CTQ2013-44083-P.
URI: http://hdl.handle.net/10045/53166
ISSN: 0021-9517 (Print) | 1090-2694 (Online)
DOI: 10.1016/j.jcat.2015.04.032
Idioma: eng
Tipus: info:eu-repo/semantics/article
Drets: © 2015 Elsevier Inc.
Revisió científica: si
Versió de l'editor: http://dx.doi.org/10.1016/j.jcat.2015.04.032
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