Fuel cell applied research: electrocatalysis and materials. Quarterly report, October 1-December 31, 1979

Technical Report · Thu May 01 04:00:00 EDT 1980

DOI:https://doi.org/10.2172/6658842· OSTI ID:6658842

Srinivasan, S.; Isaacs, H. S.; McBreen, J.; O'Grady, W. E.; Olender, H.; Olmer, L. J.; Schouler, E. J.L.; Kordesch, K. V.

Research on electrocatalysis of phosphoric acid fuel cell reactions is reported. Five types of carbon obtained from Cabot Laboratories (Cabot designation of carbons - Monarch 1300, CSX 98, Mogul L, Vulcan XC-72R and Regan 660R) were compared as supports for platinum electrocatalysts. Experiments were conducted to determine the wetting characteristics of the carbons on the electrocatalytic activity of supported platinum for oxygen reduction. The latter was investigated by a cyclic voltammetry technique. The changes in the electrochemically active surface areas on increasing the temperature from 25/sup 0/ to 135/sup 0/C and after carrying out oxygen reduction were measured from the hydrogen desorption charge in the cyclic voltammograms. Also, research on electrode kinetics in high-temperature solid electrolyte fuel cells is described. The influence of electrode material on oxygen reduction kinetics and the reaction mechanism on platinum at interfaces with solid electrolytes were investigated. Direct current and alternating current impedance techniques were used. Studies on the oxidation of H/sub 2/ on platinum and gold interfaces with the zirconia electrolyte interface were begun. Experiments on single contact ball electrodes of platinum were used. Slow potential sweep techniques (scan rate 5 mV/sec) were used. Results are presented and discussed. (WHK)

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 6658842
• Report Number(s): BNL-51272
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
ACID ELECTROLYTE FUEL CELLS
CARBON
CATALYST SUPPORTS
CATALYSTS
CATHODES
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CURRENTS
DATA
DIRECT ENERGY CONVERTERS
ELECTROCATALYSTS
ELECTROCHEMICAL CELLS
ELECTRODES
ELECTROLYTES
ELEMENTS
FABRICATION
FLUORINATED ALIPHATIC HYDROCARBONS
FUEL CELLS
HALOGENATED ALIPHATIC HYDROCARBONS
HIGH-TEMPERATURE FUEL CELLS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KINETICS
MEASURING INSTRUMENTS
METALS
METERS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
POLARIZATION
POLYETHYLENES
POLYMERS
POLYOLEFINS
REACTION KINETICS
REFRACTORY METALS
TESTING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VOLTAMETRY
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS