INVESTIGATION OF A CARBON-SUPPORTED QUATERNARY PT-RU-SN-W CATALYST FOR DIRECT METHANOL FUEL-CELLS (Articolo in rivista)

Type
Label
  • INVESTIGATION OF A CARBON-SUPPORTED QUATERNARY PT-RU-SN-W CATALYST FOR DIRECT METHANOL FUEL-CELLS (Articolo in rivista) (literal)
Anno
  • 1995-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/0378-7753(94)02178-6 (literal)
Alternative label
  • ARICO, AS; POLTARZEWSKI, Z; KIM, H; MORANA, A; GIORDANO, N; ANTONUCCI, V (1995)
    INVESTIGATION OF A CARBON-SUPPORTED QUATERNARY PT-RU-SN-W CATALYST FOR DIRECT METHANOL FUEL-CELLS
    in Journal of power sources (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • ARICO, AS; POLTARZEWSKI, Z; KIM, H; MORANA, A; GIORDANO, N; ANTONUCCI, V (literal)
Pagina inizio
  • 159 (literal)
Pagina fine
  • 166 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 55 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 2 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Warsaw University of Technology; Seoul National University (literal)
Titolo
  • INVESTIGATION OF A CARBON-SUPPORTED QUATERNARY PT-RU-SN-W CATALYST FOR DIRECT METHANOL FUEL-CELLS (literal)
Abstract
  • An investigation was carried out in the electro-oxidation of methanol on a carbon-supported quaternary Pt-Ru-Sn-W catalyst prepared by a liquid-phase reduction method. As derived by X-ray diffraction and X-ray photoelectron spectroscopy, the catalyst was composed of metallic Pt, microcrystalline RuO2 and SnO2 phases and amorphous WO3/WO2 species. The electrochemical analysis was carried out in half-cell containing sulfuric acid electrolyte as well as in a liquid methanol-fed solid polymer electrolyte single-cell. The activity of catalyst in the half-cell varied as a function of the methanol concentration, it increased with CH3OH molarity in the activation-controlled region and showed a maximum in 2 M CH3OH at high currents. IR-free polarization curves showed that the activity of the quaternary catalyst was superior to Pt metal/C samples having the same Pt amount. The presence of semi-insulating metal oxides such as RuO2, SnO2 and WO3 on the electrode surface exhibited a significant uncompensated resistance. The single-cell performance was lower than that predicted by the half-cell experiments mainly due to the methanol cross-over through the Nafion membrane. (literal)
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