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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Published in | Journal of the Electrochemical Society Vol. 139:9 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
United States
01.09.1992
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Subjects | |
Online Access | Get full text |
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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. |
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Bibliography: | None |
ISSN: | 0013-4651 1945-7111 |
DOI: | 10.1149/1.2221237 |