Abstract
The metal-support interactions for a model silica-supported copper catalyst have been studied using temperature-programmed desorption, X-ray photoelectron and infrared reflection-absorption spectroscopies under ultrahigh vacuum conditions. The model catalyst support was prepared by synthesizing a thin SiO 2 film (∼ 100 A ̊ ) on a Mo(110) surface. Copper was then evaporated onto the SiO 2 films. A small amount of copper (< 0.1 monolayer) is partially oxidized at the Cu SiO 2 interface with the remainder forming 3D-clusters. The desorption energy of copper from the SiO 2 is found to depend markedly on copper coverage (cluster size).
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