Abstract
The interactions between titanium oxide and Pt, Pd, and Rh have been studied by incorporating titanium oxide onto the clean metal foils. Auger electron spectroscopy and temperature-programmed desorption of CO and H 2 were used to characterize the oxide layers. On all three metals, a monolayer species could be formed which had a stoichiometry of approximately TiO. Complete suppression of CO and H 2 adsorption was observed at an oxygen coverage approximately 1 × 10 15/cm 2 on each surface. However, differences in the titania layers on each metal were observed at high temperatures. On Pt, the titanium oxide species dissolved reversibly into the bulk when the sample was heated above 1300 K. On Rh, the oxide layer remained on the surface at temperatures as high as 1400 K, although evidence was found that significant quantities of titanium oxide were present in the bulk. On Pd, the layer decomposed at 1100 K to form a PdTi alloy. These results are used to discuss the strong metal-support interactions observed with TiO 2-supported metals.
Sign-in/Register to access full text options 
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
