Pt catalysts modified with Bi: enhancement of the catalytic activity for alcohols oxidation in alkaline media

Marta Costa Figueiredo, R. Arán-Aís, J.M. Feliu, Kyösti Kontturi, Tanja Kallio

    Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

    31 Sitaatiot (Scopus)
    242 Lataukset (Pure)

    Abstrakti

    Recent developments on anion exchange membranes for fuel cell application renewed the interest in the study of alcohol oxidation at high pHs for applications in Anion Exchange Membrane Direct Alcohol Fuel Cells (AEM-DAFC). Although platinum is still the most studied catalyst for oxidation of alcohols in alkaline media, the introduction of one or more metals in order to increase the oxophilicity of the catalyst is a common approach in the development of improved materials for these reactions. In this manuscript, we report the enhancement of the catalytic activity of Pt/C toward ethanol, methanol and propanol oxidation in alkaline media by simple adsorption of Bi surface. The activity was checked by cyclic voltammetry, the reaction products and intermediates were analyzed by “in-situ” infrared spectroscopy. The presence of Bi showed to increase of the activity of Pt toward the oxidation of the referred alcohols by acting as a third body (impeding surface poisoning) and also by an electronic effect (on water adsorption at the surface).
    AlkuperäiskieliEnglanti
    Sivut78-86
    Sivumäärä9
    JulkaisuJournal of Catalysis
    Vuosikerta312
    DOI - pysyväislinkit
    TilaJulkaistu - huhtik. 2014
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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