Abstract
The atomic surface structure of real and model catalysts is often analysed on a monolayer scale by various surface analytical techniques, in particular ion scattering spectroscopy (ISS). The question to which extent the surface roughness influences these studies has been tackled by investigating a series of A1 2O 3 samples, the roughness of which ranges from polished single crystal sapphire surfaces to pressed powder wafers. By anodically oxidizing Al sheets under different conditions, various intermediate states of surface roughness have been produced. The ISS results show that the absolute intensity in the scattering peaks decreases strongly with increasing surface roughness. However, the relative intensities of the surface components (e.g. Al, O, and Mo from adsorbed molybdate) remain rather unchanged. Therefore, the conclusions appear to be justified that with respect to these results ISS provides valid composition ratios also for rough powder samples and that plane model catalyst studies bear relevance for the description of real catalyst systems.
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 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.
