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

Marta Costa Figueiredo, Olli Sorsa, R.M. Arán-Ais, Nguyet Doan, J.M. Feliu, Tanja Kallio

    Research output: Contribution to journalArticleScientificpeer-review

    17 Citations (Scopus)
    148 Downloads (Pure)

    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 trough 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 by the 3 metals are necessary to achieve the highest performance. In situ Fourier Transformed 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.
    Original languageEnglish
    Pages (from-to)69-77
    Number of pages9
    JournalJournal of Catalysis
    Volume329
    DOIs
    Publication statusPublished - Sep 2015
    MoE publication typeA1 Journal article-refereed

    Keywords

    • PtRu catalysts, antimony, irreversible adsorption, direct ethanol fuel cells

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