Oxygen reduction kinetics at the perfluorosulfonate ionomer film-coated platinum interface

The hydrogen-oxygen field cell converts the chemical energy of H{sub 2} and O{sub 2} directly into electrical energy. This energy conversion occurs at separated gas-diffusion Pt electrodes. In order to complete the circuit, an ion conducting electrolyte is placed between the electrodes and an extern...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1992-02, Vol.139 (2), p.62C-67C
Main Author: LAWSON, D. R
Format: Article
Language:English
Subjects:
08 HYDROGEN
080800 > Hydrogen-- Properties & Composition
30 DIRECT ENERGY CONVERSION
300502 > Fuel Cells-- Performance & Testing
400400 > Electrochemistry
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
Chemistry
CONVERSION
DIRECT ENERGY CONVERTERS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMICAL CELLS
Electrochemistry
ELECTRODES
ELECTROLYTES
ELEMENTS
ENERGY CONVERSION
Exact sciences and technology
FUEL CELLS
General and physical chemistry
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN FUEL CELLS
INORGANIC ACIDS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
INTERFACES
IONIC CONDUCTIVITY
KINETICS
Kinetics and mechanism of reactions
MATERIALS TESTING
METALS
NONMETALS
OXYGEN
PHOSPHORIC ACID
PHYSICAL PROPERTIES
PLATINUM
PLATINUM METALS
REACTION KINETICS
REDOX FUEL CELLS
REDOX REACTIONS
REGENERATIVE FUEL CELLS
TESTING
TRANSITION ELEMENTS 300503 > Fuel Cells-- Materials, Components, & Auxiliaries
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Description
Summary:The hydrogen-oxygen field cell converts the chemical energy of H{sub 2} and O{sub 2} directly into electrical energy. This energy conversion occurs at separated gas-diffusion Pt electrodes. In order to complete the circuit, an ion conducting electrolyte is placed between the electrodes and an external electronic circuit collects the energy produced by the fuel cell reactions. The goal of the research descried in this paper was to characterize oxygen reduction kinetics at a series of Dow PFSI film-coated Pt electrodes. The final objective was to determine which PFSI offers the greatest performance enhancement for the PAFC application. While Nafion provided some kinetic enhancement, the Dow PFSIs offer an opportunity to study the effect of PSFI structure and equivalent width on the O{sub 2} reduction reaction. Although the Nafion and Dow PFSIs are structurally similar, the sidechain in the Dow PSFI is less bulky. In addition, the Dow PFSIs are available in a series of equivalent weights from 635 to 1269, whereas Nafion is available in only one intermediate equivalent weight. We describe the results of these studies in this report.
ISSN:0013-4651
1945-7111