RESEARCH ON LOW TEMPERATURE FUEL CELL SYSTEMS
GENERAL ELECTRIC CO WEST LYNN MASS
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FUEL ELECTRODE STUDIES The effect of varying the Pt black upon the performance of porous pasted catalyst screen electrodes was evaluated. Polarization curves of cells containing Engelhard Pt black electrodes and operating on H and ethylene indicated that some improvement was achieved with both these fuel gases. Variations in the performance of different Pt blacks were also observed with the conducting porous Teflon electrodes, especially with O, both in acidic and alkaline cells. Metal powders were evaluated in the pasted catalyst screen electrode structure for their ability to promote oxidation. Examination of C-base electrodes continued using the conducting porous Teflon structures. A micro gas system was constructed for the measurement of gas consumption by fuel cells under load. OXYGEN ELECTRODE Research of the kinetics of the O electrode in acidic and alkaline media continued using porous platinized, semi-hydrophobic carbons andor Pt as the electrode materials. Open circuit voltages of 1.20 or - 0.03 v for the O electrode were reproduced in 25 KOH solutions and platinized C or Pt electrodes.