Accession Number:

AD0445787

Title:

ELECTROCHEMISTRY OF FUEL CELLS ELECTRODES. THE USE OF LARGE ANODIC. GALVANOSTATIC TRANSIENTS TO EVALUATE THE MAXIMUM ADSORPTION ON PT FROM HCOOH SOLUTIONS,

Descriptive Note:

Corporate Author:

TYCO LABS INC WALTHAM MA

Personal Author(s):

Report Date:

1964-08-01

Pagination or Media Count:

26.0

Abstract:

The adsorption on smooth Pt, from HCOOH solutions in 1N HC104 at 40 C has been studied with anodic and cathodic galvanostatic transients. During the application of a large anodic current, Ia, three processes contribute to the charge passed, Qa. These are I oxidation of adsorbate, II oxidation of a species in solution, and III surface oxidation of the electrode. By applying a cathodic current, Ic, at various times during the anodic transient, it is possible to measure III directly and, from the charge passed in deposition of H-atoms prior to H2 evolution, one can follow changes in the concentration of absorbed HCOOH. By varying Ia, one can assess the effect of II. It is found that the contributions of processes I, II, and III can be effectively separated. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE