Abstract
Anomalous effects such as the enhanced sticking probability of CO and O 2 and the partial CO dissociation were measured on small Pd particles deposited on γ-alumina. Recently, a dependence of the sticking coefficient on the substrate has also been reported on Pd (0001) α-alumina but no dissociation has been observed in this case. We present a detail study of CO adsorption/desorption and catalytic reaction properties for a series of alumina substrates. Particularly, we used α-alumina of surface orientations (0001) and (11̄02). Before the Pd deposition, the substrates were exposed to annealing at different temperatures in vacuum and in the air. The adsorption and reaction parameters of Pd particles change with crystallographical structure and stoichiometry of the substrate surface, essentially due to the effect of reactants diffusion over the substrate.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
