Fuel cell applied research: electrocatalysis and materials. Quarterly report, July 1-September 30, 1978

Technical Report · Fri Jun 01 04:00:00 EDT 1979

DOI:https://doi.org/10.2172/5650422· OSTI ID:5650422

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

A study was undertaken to investigate the electrocatalysis of the formic acid and methanol oxidation reactions at underpotentially deposited metal surfaces at 25/sup 0/C. The test electrode was a smooth polycrystalline platinum disc, on which a metal Bi, Cd, Pb or Tl was underpotentially deposited (UPD) by potential cycling in 1 N HClO/sub 4/. The organic reactant (HCOOH or CH/sub 3/OH) was added to this electrolyte so that its concentration was 0.26 M. Cyclic voltammograms were recorded on the Pt (control) and on the UPD test electrodes at a sweep rate of 50 mV/sec in the potential range of 0 to 1.45 V/RHE. Results are reported. Also, overpotentials in solid electrolyte fuel cells were studied. Alternating and direct current techniques were used to determine the impedance characteristics at the platinum-yttria stabilized zirconia (YSZ) interface in the regions of potentials where the oxygen evolution and reduction reactions take place. The measurements were conducted as a function of time to elucidate aging effects on the kinetics of these reactions. Experiments were conducted at 1000/sup 0/C in the potential range of -600 to +600 mV vs an air reference electrode. Results are presented and discussed. (WHK)

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: EY-76-C-02-0016
• OSTI ID: 5650422
• Report Number(s): BNL-51053
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300502 -- Fuel Cells-- Performance & Testing
300503* -- Fuel Cells-- Materials
Components
& Auxiliaries
ALCOHOL FUEL CELLS
ALCOHOLS
CARBOXYLIC ACIDS
CATALYSIS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CURRENTS
DATA
DATA FORMS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROLYTES
ELEMENTS
FORMIC ACID
FORMIC ACID FUEL CELLS
FUEL CELLS
HYDROXY COMPOUNDS
IMPEDANCE
INFORMATION
METALS
METHANOL
MONOCARBOXYLIC ACIDS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YTTRIUM COMPOUNDS
ZIRCONIUM COMPOUNDS