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

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Title: Trimetallic catalyst based on PtRu modified by irreversible adsorption of Sb for direct ethanol fuel cells
Authors: Figueiredo, Marta C. | Sorsa, Olli | Arán-Ais, Rosa M. | Doan, Nguyet | Feliu, Juan M. | Kallio, Tanja
Research Group/s: Electroquímica de Superficies
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: PtRu catalysts | Antimony | Irreversible adsorption | Direct ethanol fuel cells
Knowledge Area: Química Física
Issue Date: Sep-2015
Publisher: Elsevier
Citation: Journal of Catalysis. 2015, 329: 69-77. doi:10.1016/j.jcat.2015.04.032
Abstract: 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.
Sponsor: 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.
ISSN: 0021-9517 (Print) | 1090-2694 (Online)
DOI: 10.1016/j.jcat.2015.04.032
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2015 Elsevier Inc.
Peer Review: si
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Appears in Collections:INV - EQSUP - Artículos de Revistas

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