State and action of the tin atoms in platinum--tin catalysts for methanol fuel cells
Journal Article
·
· J. Catal.; (United States)
The behavior of platinum-tin electrodes in cyclic voltammetry in pure acid and the kinetics of methanol oxidation on these electrodes have been studied. By using the cyclic voltammetry technique it was possible to demonstrate that the tin atoms are present in the zero-valent state and hence are not acting as a cocatalyst via a redox couple between their oxidic forms. It is furthermore shown that the zero-valent tin atoms influence the adsorption properties of the platinum atoms. The enhancement in methanol oxidation rate on platinum-tin electrodes is explained in terms of a ''ligand'' effect.
- Research Organization:
- Shell Research B.V., Amsterdam
- OSTI ID:
- 7260660
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 46:3; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Sat Dec 31 23:00:00 EST 1988
·
OSTI ID:6338634
Related Subjects
090210 -- Alcohol Fuels-- Properties-- (1976-1989)
10 SYNTHETIC FUELS
30 DIRECT ENERGY CONVERSION
300505* -- Fuel Cells-- Electrochemistry
Mass Transfer & Thermodynamics
ALCOHOL FUEL CELLS
ALCOHOLS
ALLOYS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL STATE
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELEMENTS
FUEL CELLS
HYDROXY COMPOUNDS
KINETICS
METALS
METHANOL
ORGANIC COMPOUNDS
OXIDATION
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
REACTION KINETICS
TIN
TIN ALLOYS
10 SYNTHETIC FUELS
30 DIRECT ENERGY CONVERSION
300505* -- Fuel Cells-- Electrochemistry
Mass Transfer & Thermodynamics
ALCOHOL FUEL CELLS
ALCOHOLS
ALLOYS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL STATE
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELEMENTS
FUEL CELLS
HYDROXY COMPOUNDS
KINETICS
METALS
METHANOL
ORGANIC COMPOUNDS
OXIDATION
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
REACTION KINETICS
TIN
TIN ALLOYS