Abstract
This paper deals with the adsorption and decomposition of nitrous oxide and the chemisorption of oxygen on silver powders and silver-on-carrier catalysts. Adsorptiondecomposition was studied at temperatures between 25 and 250 °C and 15 cm Hg nitrous oxide pressure; the chemisorption experiments were performed at 50–250 °C and 10 −3 to 200 mm Hg. Methods are indicated for calculating the free-silver surface area. In cases where different techniques can be employed the results appeared to be in rather good agreement with X-ray line broadening and electron microscopy data. Special attention is given to the influence of surface contaminations on the sorption behaviour of oxygen. The presence of carbonaceous contaminations may introduce subsurface oxidation. At full coverage silver adsorbs about 25% more oxygen from O 2 than it does from N 2O.
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