Ling Zhou and Robert J. Madix
The overall objective of our research is to understand the effects of spatial organization on the reactivity of adsorbed layers on metal surfaces. This is one of the frontier areas in the emerging field of nanotechnology, as it related directly to the design of heterogeneous catalysts using metal crystals of nanometer dimensions. We are investigating (1) the incorporation of "added" metal atoms to the structures of adsorbates and reaction intermediates on a wide range of catalytic metal surfaces to examine the generality of this surface phenomenon; (2) the effects of complex promoter combinations on the surface structure and reactivity of model silver surfaces chemistry for oxidation; (3) the surface processes involved in two dimensional kinetic explosions. In these studies we coordinate the scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and temperature-programmed reaction spectroscopy (TPRS) measurements.
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