Steps on titania nanoparticles
What is it about?
By studying the adsorption of carbon monoxide on TiO2 materials with different morphology, we revealed a new class of vibrations, which are much more sensitive than the stretching mode of CO in probing the surface topography by IR spectroscopy.
Why is it important?
Titania nanopowders have important applications in catalysis and sustainability. Understanding how the reactivity of TiO2 nanoparticles depends on the local structure of the surface is crucial for further progress. This is very difficult, because the geometric structure and local environment of the reactive sites are not known yet. We found that a frustrated mode of adsorbed CO is exceptionally sensitive to the presence of surface steps. Such IR band may become a key tool for detecting specific defective sites on TiO2 surfaces.
The following have contributed to this page: Gloria Tabacchi
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