Evidence of local pH changes during ethanol oxidation at Pt electrodes in alkaline media

Marta Costa Figueiredo, Rosa M. Aran-Ais, Victor Climent, Tanja Kallio, Juan M. Feliu

    Research output: Contribution to journalArticleScientificpeer-review

    22 Citations (Scopus)

    Abstract

    The demand for power sources alternative to fossil fuels makes urgent the development of new and more efficient electrocatalysts for fuel cells applications and the maximization of the performances of the existent ones. This work reports, for the first time, the use of carbon-supported shape-controlled Pt nanoparticles as anode catalysts in direct ethanol fuel cells. By using cubic Pt nanoparticles, on which (100) surface sites are predominant, the performance of the fuel cell can be increased from 14 to 28 mW per mg of Pt when compared with cuboctahedral nanoparticles. Moreover, the open circuit potential shifts about 50 mV toward more positive potentials. In comparison with commercially
    available Pt catalysts, the performance for the (100) preferentially oriented nanoparticles is about 3 times higher.
    Original languageEnglish
    Pages (from-to)1254-1258
    Number of pages5
    JournalCHEMELECTROCHEM
    Volume2
    Issue number9
    DOIs
    Publication statusPublished - Sep 2015
    MoE publication typeA1 Journal article-refereed

    Keywords

    • direct ethanol fuel cells, shape controlled nanoparticles, electrocatalysis

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