INCAPE 05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
Effect of Sn content on Pt/CNT electrocatalysts for direct ethanol fuel cell application
Autor/es:
NAGEL, PABLO A.; DE MIGUEL, SERGIO R.; VEIZAGA, NATALIA S.; AZCOAGA CHORT, M. FLORENCIA; RODRÍGUEZ, VIRGINIA I.
Revista:
THE CANADIAN JOURNAL OF CHEMICAL ENGINEERING
Editorial:
JOHN WILEY & SONS INC
Referencias:
Lugar: New York; Año: 2021
ISSN:
0008-4034
Resumen:
Several bimetallic PtSn catalysts supported on multiwalled carbon nanotubes for ethanol electro-oxidation were prepared by conventional impregnation-reduction method. The Pt loading was kept at 20 wt.% and Pt:Sn atomic ratios of 5:1, 3:1, and 1:1 were selected. The catalysts were structurally characterized by temperature programmed reduction, X-ray diffraction, X-ray photoelectron spectroscopy, H2 chemisorption, cyclohexane dehydrogenation reaction, and transmission electron microscopy. The electrochemical characterization of the electrocatalytic materials was carried out in acid medium by cyclic voltammetry, linear sweep voltammetry, chronoamperometry, and CO stripping techniques. Among the different stoichiometries tested, the Pt(20)Sn(12.17)/CNT catalyst exhibited the highest electrocatalytic activity for ethanol oxidation reaction, with mass current density of 189.5 mA mgPt−1 at 796 mV (vs. Ag/AgCl).
