Accession Number : AD0287055

Title :   A FEASIBILITY STUDY OF PALLADIUM AS A HYDROGEN DIFFUSION ELECTRODE MATERIAL FOR FUEL CELLS

Corporate Author : FLORIDA UNIV GAINESVILLE ENGINEERING AND INDUSTRIAL EXPERIMENT STATION

Personal Author(s) : CHIU,LEON L.

Report Date : 01 OCT 1962

Pagination or Media Count : 1

Abstract : Pd films as H diffusion electrodes in fuel cells were investigated and found to posses very interesting possibilities when the thickness is of the order of 100 Angstrom - or at temperatures above 200 C. Above 400 C, H transport through Pd films is found to follow a semi-logarithmic relationship, with an activation energy for diffusion of about 5.5 kcal/g-mole. At approximately 200 C, a low temperature phase having the approximate composition Pd2H forms with a heat of dissociation of about 8.5 kcal/g-mole. At temperatures below 150 C, the current density supportable by mass transport is too low to make Pd films suitable for gas diffusion electrodes in fuel cells. Additional experimental work is suggested to clarify the possibilities of using Pd as a fuel cell electrode under conditions other than those indicated above. (Author)

Descriptors :   *ELECTRODES, *FUEL CELLS, *HYDROGEN, *PALLADIUM, CHEMICAL EQUILIBRIUM, DENSITY, DIFFUSION, FEASIBILITY STUDIES, FILMS, PHYSICAL PROPERTIES, POWER SUPPLIES, REACTION KINETICS, SOLUBILITY, THEORY, TRANSPORT PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE