Abstract
Deuterium exchange with surface hydroxyl groups on rutile was studied using D2 and D2O; the former completely exchanges at 300°C (2 h) with evidence for surface reduction, while the latter does not achieve complete exchange with the saturated vapour at room temperature. The shift in infra-red frequencies on deuteration verified previous assignments of surface species as being hydrogenic and also indicated the physical inaccessibility of certain species. Adsorption of CO2 produced a labile bicarbonate species and indicates the separate chemical identity of the two surface hydroxyl species represented by peaks at 3700 and 3670 cm–1. But-1-ene interacts with the rutile surface at 150°C with formation of surface alkoxide, and indicates the presence of inaccessible surface groups, but gives no evidence for preferential reaction by one of the hydroxyl groups.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call