A STUDY OF THE ADSORPTION MECHANISMS ON OXYGEN ELECTRODES
Abstract
An improved method for studying the exchange of oxygen with O18 pre- adsorbed on a metal surface is reported. Detailed information on the nature of the chemisorbed oxygen on silver and the isotopic exchange mechanism at 200 C was obtained. The rates of chemisorption and dissociation were determined, which are two distinct processes beyond a certain oxygen coverage. Oxygen pressure versus temperature characteristics and isotopic exchange reactions on carefully cleaned silver and silver-gold alloy powder surfaces are reported. The powders were all prepared by a spark erosion method. A strong increase in the exchange activity was obtained at elevated temperatures by dilution of the silver. With pure silver at room temperature a dissociative oxygen exchange was observed which decreased with time. A palladium powder (of commercial origin) was active only above 100 C.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 29, 1963
- Accession Number
- AD0404296
Entities
People
- Y. L. Sandler