Carbon-supported Pt–Fe alloy as a methanol-resistant oxygen-reduction catalyst for direct methanol fuel cells

Shukla, AK and Raman, RK and Choudhury, NA and Priolkar, KR and Sarode, PR and Emura, S and Kumashiro, R (2004) Carbon-supported Pt–Fe alloy as a methanol-resistant oxygen-reduction catalyst for direct methanol fuel cells. In: Journal of Electroanalytical Chemistry, 563 (2). pp. 181-190.

PDF Carbon-supported-564.pdf Restricted to Registered users only Download (350Kb) | Request a copy

Abstract

Crossover of methanol from the anode to the cathode through the polymer–electrolyte membrane in solid–polymer–electrolyte direct methanol fuel cells constitutes a significant loss in their performance. Pt/C and Pt–Fe/C electrocatalysts have been characterized by X-ray diffraction, and X-ray photoelectron and X-ray absorption spectroscopies in conjunction with electrochemistry. It is found that Pt–Fe/C alloy crystallizing in an ordered face centered tetragonal crystal structure with higher proportions of active-platinum sites and a completely different nearest neighbour environment than Pt/C exhibits significantly high oxygen-reduction activity in the presence of methanol while Pt/C shows a methanol poisoning effect under similar conditions.

Item Type:	Journal Article
Additional Information:	The copyright belongs to Elsevier.
Keywords:	Pt–Fe alloy;Oxygen-reduction catalyst;Direct methanol fuel cells;X-ray photoelectron spectroscopy;X-ray absorption spectroscopy
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	29 May 2006
Last Modified:	19 Sep 2010 04:27
URI:	http://eprints.iisc.ernet.in/id/eprint/7058

Actions (login required)

View Item