New insight into the pathways of methanol oxidation

Methanol electrooxidation at Pt(1 1 1) is extremely sensitive to the nature of the supporting electrolyte. Much lower currents for methanol oxidation are observed in H 2SO 4 than in HClO 4 solutions, specific adsorption of sulfate being responsible for the inhibitory effect. While this effect is lar...

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Bibliographic Details
Published in:Electrochemistry communications 2003-10, Vol.5 (10), p.843-846
Main Authors: Batista, E.A., Malpass, G.R.P., Motheo, A.J., Iwasita, T.
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Electrocatalysis
Electrochemistry
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
General and physical chemistry
Kinetics and mechanism of reactions
Methanol oxidation
Parallel pathways
Reaction mechanism
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Summary:Methanol electrooxidation at Pt(1 1 1) is extremely sensitive to the nature of the supporting electrolyte. Much lower currents for methanol oxidation are observed in H 2SO 4 than in HClO 4 solutions, specific adsorption of sulfate being responsible for the inhibitory effect. While this effect is largely known, its fundamental consequences for the reaction mechanism were not evident till now. This is the subject of the present paper. The analysis of data on the yields of soluble products using both supporting electrolytes throws new light on the important question of the mechanism of parallel pathways during methanol oxidation reaction.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2003.08.010