Departmental Papers (CBE)
Document Type
Journal Article
Date of this Version
December 2007
Abstract
The adsorption and bonding configuration of CO on clean and Zn-covered Pd(111) surfaces was studied using Low Energy Electron Diffraction (LEED), Temperature Programmed Desorption (TPD) and High Resolution Electron Energy Loss Spectroscopy (HREELS). LEED and TPD results indicate that annealing at 550 K is sufficient to induce reaction between adsorbed Zn atoms and the Pd(111) surface resulting in the formation of an ordered surface PdZn alloy. Carbon monoxide was found to bond more weakly to the Zn/Pd(111) alloy surfaces compared to clean Pd(111). Zn addition was also found to alter the preferred adsorption sites for CO from threefold hollow to atop sites. Similar behavior was observed for supported Pd-Zn/Al2O3 catalysts. The results of this study show that both ensemble and electronic effects play a role in how Zn alters the interactions of CO with the surface.
Keywords
low index single crystal surfaces, alcohols, palladium, zinc, thermal desorption, vibrations of adsorbed molecules
Recommended Citation
Jeroro, E., Lebarbier, V., Datye, A., Wang, Y., & Vohs, J. M. (2007). Interaction of CO with Surface PdZn Alloys. Retrieved from https://repository.upenn.edu/cbe_papers/102
Date Posted: 29 January 2008
This document has been peer reviewed.
Comments
Postprint version. Published in Surface Science, Volume 601, Issue 23, December 2007, pages 5546-5554.
Publisher URL: http://dx.doi.org/10.1016/j.susc.2007.09.031