Resumen

HOYOS, Bibian A; RESTREPO, Ana I  y  MESA, Carlos M. Pt-Ru and Pt-Ir Anodes for Direct Methane and Propane Proton Exchange Membrane Fuel Cells. Inf. tecnol. [online]. 2007, vol.18, n.4, pp.41-46. ISSN 0718-0764.  http://dx.doi.org/10.4067/S0718-07642007000400007.

In this paper, the effect of temperature in the performance of proton exchange membrane fuel cells feed with methane and propane, using oxygen as feed to the cathode, is presented. For the fuel oxidation in the anodes, five carbon supported catalysts were tested: Pt, Pt₈₅/Ru₁₅, Pt₅₀/Ru₅₀, Pt₉₀/Ir₁₀, and Pt₅₀/Ir₅₀. Carbon-supported pure platinum was used as catalysts in the cathode side. The performance of the fuel cells was evaluated by polarization curves obtained from the current-potential data. Results indicate that methane oxidation is favoured at high temperatures on the Pt₉₀/Ir₁₀, Pt₅₀/Ir₅₀ and Pt₅₀/Ru₅₀ catalysts. At low temperatures the best catalysts were Pt and Pt₈₅/Ru₁₅. The Pt₈₅/Ru₁₅ bimetallic mixture showed the best performance to carry out propane oxidation at 30 °C.

Palabras clave : fuel cells; Pt-Ru and Pt-Ir anodes; direct propane; direct methane.

        · resumen en Español     · texto en Español     · Español ( pdf )