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Synergitic Promotion of Electrooxidation of Methanol of Carbon-Supported PT-SN Catalysts

Arico, AS and Antonucci, V and Giordano, N and Shukla, AK and Ravikumar, MK (1993) Synergitic Promotion of Electrooxidation of Methanol of Carbon-Supported PT-SN Catalysts. In: Bulletin of Electrochemistry, 9 (11-12). 614-617 .

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Abstract

Electrooxidation of methanol in sulphuric acid on carbon-supported electrodes containing Pt-Sn bimetal catalysts prepared by an in-situ route is reported, The catalysts have been characterized employing chemical analyses, XRD, and XANES data in conjunction with electrochemistry. This study suggests that the Sn content in Pt-Sn bimetals produces: (i) a charge transfer from Sn to Pt and (ii) an increase in the coverage of adsorbed methanolic residues with the Sn content. From the electrode-kinetics data, it is inferred that while the electrodes of (3:3) Pt-Sn/C catalyst involve a 2-electron rate-limiting step akin to Pt/C electrodes, it is shifted to only 1-electron on (3:2) Pt-Sn/C, (3:3) Pt-Sn/C, and (3:4) Pt-Sn/C electrodes.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Scientific Publishers.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 11 Mar 2011 07:00
Last Modified: 11 Mar 2011 07:00
URI: http://eprints.iisc.ernet.in/id/eprint/35853

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