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Electrooxidation of methanol in sulfuric-acid electrolyte on platized-carbon electrodes with several functional-group characteristics

Shukla, AK and Ravikumar, MK and Roy, A and Barman, SR and Sarma, DD and Arico, AS and Antonucci, V and Pino, L and Giordano, N (1994) Electrooxidation of methanol in sulfuric-acid electrolyte on platized-carbon electrodes with several functional-group characteristics. In: Journal of the electrochemical society, 141 (6). pp. 1517-1522.

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Official URL: http://scitation.aip.org/JES

Abstract

The effect of acid/base functional-groups associated with platinized-carbon electrodes on their catalytic activity toward electro-oxidation of methanol in sulfuric acid electrolyte at 60-degrees-C is studied. Platinized-carbon electrodes with sm amounts of functional groups exhibit higher catalytic activity compared to those with large concentrations of acidic/basic surface functionalities. The overpotential for methanol oxidation is minimum on electrodes of platinized carbons with pHzpc values between 6 and 7. An x-ray photoelectron spectroscopic study of various platinized carbons suggests that the acid/base surface functional-groups produce ample amounts of surface Pt-oxides and a consequent decrease in activity toward methanol oxidation.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to The Electrochemical Society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 31 May 2011 09:51
Last Modified: 31 May 2011 09:51
URI: http://eprints.iisc.ernet.in/id/eprint/36444

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