Surface Science Studies of Strong Metal-Oxide Interactions on Model Catalysts
Here we report on recent model studies of a phenomenon known in catalysis as the “Strong Metal-Support Interaction” (SMSI for short). Decoration of the surfaces of precious metal single crystals, films, and nanoparticles supported on titania produces beautiful long-range ordered structures which can often be resolved at atomic resolution using scanning tunneling microscopy (STM). Such surfaces show reduced binding for CO and effectively lower the activity of the surface. Consideration is given to the cause and composition of the surface layer, that is, whether it is a kind of intermetallic layer, or is simply a thin layer of titanium (sub-)oxide.
KeywordsScanning Tunneling Microscopy Scanning Tunneling Microscopy Image Model Catalyst Scanning Tunneling Spectroscopy Strong Metal Support Interaction
We are grateful to a number of students for their work in this area of model oxide surface science, in particular Peter Stone, Neil Perkins, Elodie Fourré, and Rupert Smith. All of those students, and RAB were supported by the EPSRC, while additional support for the students was provided by Cardiff University, the University of Reading, Oxford Instruments, and Johnson Matthey plc. We are grateful to all of these organizations for their sponsorship of our research.
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