Electrochemical properties of perfluoroalkane disulfonic [HSO[sub 3](CF2)[sub n]SO[sub 3]H] acids relevant to fuel cell technology

In this paper the electrochemical properties of a homologous series of perflouroalkane-[alpha], [omega]-disulfonic acids are measured. These acids are high molecular weight analogs of trifluoromethane sufonic acid, having the general molecular formula [HSC[sub 3](CF[sub 2])[sub n]SO[sub 3]H]. Proper...

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Bibliographic Details
Published inJournal of the Electrochemical Society Vol. 139:9
Main Authors Saffarian, H., Ross, P.
Format Journal Article
LanguageEnglish
Published United States 01.09.1992
Subjects
30 DIRECT ENERGY CONVERSION
300505 > Fuel Cells > Electrochemistry, Mass Transfer & Thermodynamics
400400 > Electrochemistry
AQUEOUS SOLUTIONS
CHEMISTRY
DIRECT ENERGY CONVERTERS
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELECTROLYTES
FLUORINE COMPOUNDS
FUEL CELLS
HALOGEN COMPOUNDS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MATERIALS TESTING
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PH VALUE
PHYSICAL PROPERTIES
SOLUTIONS
SULFONIC ACIDS
TESTING 300503 > Fuel Cells > Materials, Components, & Auxiliaries
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Summary:In this paper the electrochemical properties of a homologous series of perflouroalkane-[alpha], [omega]-disulfonic acids are measured. These acids are high molecular weight analogs of trifluoromethane sufonic acid, having the general molecular formula [HSC[sub 3](CF[sub 2])[sub n]SO[sub 3]H]. Properties measured included the solubility and conductivity of aqueous solutions, the extent of anion specific adsorption of platinum, and oxygen reduction kinetics on platinum, for acids having n = 2, 4 and 6. The following trends in properties with variation in n were observed: solubility in water and the conductivity of aqueous solutions decreased dramatically with increasing n; and increase in the extent of anion specific adsorption with increasing n; at constant pH, rate of oxygen reduction of Pt decreased with increasing n; for a given acid (value of n), the rate of oxygen reduction decreased exponentially with increasing acid concentration.
Bibliography:None
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2221237