Infrared spectroscopic study of the adsorption of CO, CO2 and NO on fluorinated alumina and supported Molybdenum–Nickel catalysts
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 81 (5) , 1203-1213
- https://doi.org/10.1039/f19858101203
Abstract
Adsorption of CO, CO2, NO and O2 probe molecules has been used to study the surface of fluorinated alumina and of supported Mo–Ni catalysts. Addition of F to alumina drastically inhibited formation of carbonates from CO (at 673 K) and CO2(at room temperature) adsorption and also inhibited the formation of nitrates from NO adsorption at room temperature. Reduction with H2(773 K) followed by O2 and NO adsorption at low temperatures suggest that the active-phase Mo–Ni is more highly dispersed in the catalyst with higher F content. These data are in agreement with spectroscopic results for NO adsorption. This effect of F on the degree of metallic dispersion is probably associated with the anchoring of the polymeric ion Mo7O24 6– to the support, which is highly unfavoured by the partial substitution of hydroxyl groups by F–.Keywords
This publication has 0 references indexed in Scilit: