Desarrollo de electrocatalizadores anódicos PtGe y PtIn sobre soportes carbonosos para celdas DMFC.

NATALIA S. VEIZAGA; VALDECIR A. PAGANIN; THAIRO A. ROCHA; ERNESTO R. GONZALEZ; OSVALDO A. SCELZA; SERGIO R. DE MIGUEL

Gramado, no Rio Grande do Sul.

Congreso; 17º Congresso Brasileiro de Catálise e VII Congresso de Catálise do Mercosul.,; 2013

– Bimetallic PtGe and PtIn catalysts (Ge/Pt and In/Pt molar ratios = 0.33, 17%Pt loading) were prepared over carbonaceous supports. The liquid phase deposition-reduction method with 0.4 M sodium borohydride as a reducing agent was employed. The electrocatalytic activity for methanol oxidation was compared with a commercial Pt/VC.E-TEK catalyst. The catalysts were characterized by different techniques. The onset potential of the CO oxidation was shifted to more negative values for Vulcan carbon and carbon nanotubes supported catalysts and to less negative values in the case of mesoporous carbon supported ones. Vulcan carbon supported catalysts and nanotubes supported ones showed the best and better performances respectively