Development of advanced Kocite electrocatalysts for phosphoric acid fuel cells. Final technical report, September 1979-December 1980
These improved electrocatalysts should demonstrate a larger initial catalytic metal surface area, and a better catalytic metal surface area retention during fuel cell operation than present state-of-the-art phosphoric acid electrocatalysts. Kocite electrocatalysts impregnated with platinum and platinum-vanadium alloys were tested. The Kocite electrocatalysts were aged in electrodes potentiostated in H3PO4 half cells, and were then analyzed for catalytic metals surface area retention. Compared with the state-of-the-art platinum electrocatalysts, as represented by a standard Kocite electrocatalyst, the Kocite electrocatalysts impregnated by the techniques used in this study has a better initial platinum surface area. This initial surface area difference appeared to be maintained when the catalysts are aged at 700 mV, but was not maintained when the catalysts were aged at 800 mV. Variations of the alumina substrate and of the post-treatment of the leached Kocite catalyst support did not produce any catalysts with better platinum surface area retention than the standard catalyst. Alloying of vanadium with the platinum did produce Kocite electrocatalysts which maintained their alloy surface area better than the standard catalyst maintained its platinum surface area.
- Research Organization:
- UOP, Inc., Des Plaines, IL (USA). Corporate Research Center
- OSTI ID:
- 5940199
- Report Number(s):
- AD-A-099910/2
- Country of Publication:
- United States
- Language:
- English
Similar Records
Platinization of platinum-doped Kocite electrodes in phosphoric acid fuel cells. Interim progress report No. 3, September--December 1976
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Related Subjects
ACID ELECTROLYTE FUEL CELLS
ELECTROCATALYSTS
FABRICATION
AGING
CATALYST SUPPORTS
PHOSPHORIC ACID
PLATINUM
PLATINUM ALLOYS
VANADIUM ALLOYS
ALLOYS
CATALYSTS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELEMENTS
FUEL CELLS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
PLATINUM METAL ALLOYS
PLATINUM METALS
TRANSITION ELEMENTS
300503* - Fuel Cells- Materials
Components
& Auxiliaries