An XPS study on binary and ternary alloys of transition metals with platinized carbon and its bearing upon oxygen electroreduction in direct methanol fuel cells

Shukla, AK and Neergat, M and Bera, Parthasarathi and Jayaram, V and Hegde, MS (2001) An XPS study on binary and ternary alloys of transition metals with platinized carbon and its bearing upon oxygen electroreduction in direct methanol fuel cells. In: Journal of Electroanalytical Chemistry, 504 (1). pp. 111-119.

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Abstract

The present X-ray photoelectron spectroscopic study on carbon-supported Pt, Pt–Cr, Pt–Co, Pt–Ni, Pt–Co–Cr and Pt–Co–Ni electrocatalysts suggests that while Pt–Cr/C, Pt–Co/C and Pt–Ni/C binary alloy electrocatalysts are surface rich in platinum, both Pt–Co–Cr/C and Pt–Co–Ni/C ternary electrocatalysts happen to be surface rich in base metals. Among these electrocatalysts, Pt–Co/C electrocatalyst is found to possess a minimum amount of platinum oxides. Accordingly, Pt–Co/C exhibits a higher electrocatalytic activity towards oxygen-reduction reaction in the solid-polymer-electrolyte direct methanol fuel cells.

Item Type:	Journal Article
Publication:	Journal of Electroanalytical Chemistry
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Electrocatalysis;Alloy electrocatalysts;X-ray photoelectron spectroscopy;Oxygen-reduction reaction;Direct methanol fuel cells
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	02 Apr 2007
Last Modified:	19 Sep 2010 04:37
URI:	http://eprints.iisc.ac.in/id/eprint/10603

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