TY - JOUR
T1 - Trimetallic catalyst based on PtRu modified by irreversible adsorption of Sb for direct ethanol fuel cells
AU - Figueiredo, Marta C.
AU - Sorsa, Olli
AU - Arán-Ais, Rosa M.
AU - Doan, Nguyet
AU - Feliu, Juan M.
AU - Kallio, Tanja
N1 - Funding Information:
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.
Publisher Copyright:
© 2015 Elsevier Inc. All rights reserved.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2015/5/20
Y1 - 2015/5/20
N2 - 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.
AB - 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.
KW - Antimony
KW - Direct ethanol fuel cells
KW - Irreversible adsorption
KW - PtRu catalysts
UR - http://www.scopus.com/inward/record.url?scp=84930504727&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2015.04.032
DO - 10.1016/j.jcat.2015.04.032
M3 - Article
AN - SCOPUS:84930504727
VL - 329
SP - 69
EP - 77
JO - Journal of Catalysis
JF - Journal of Catalysis
SN - 0021-9517
ER -