AI Article Synopsis
- Understanding metal-support interactions is key for designing catalysts with specific traits, particularly in supported metal catalysts like Pt/TiO.
- This study explores model Pt/TiO catalysts through techniques like aberration-corrected scanning transmission electron microscopy and first-principles calculations to examine structural changes that enhance catalytic activity.
- Postdeposition treatment enables direct contact between Pt nanoparticles and TiO, leading to new states on both materials that influence their catalytic properties, offering insights into optimizing metal-support interactions.
Article Abstract
Understanding the nature of the interaction between a metal and support, which is known as the metal-support interaction, in supported metal catalysts is crucial to design catalysts with desired properties. Here, we have developed model Pt/TiO catalysts based on the deposition of colloidal Pt nanoparticles and studied their atomic and electronic structures before and after a postdeposition treatment that induces catalytic activity using aberration-corrected scanning transmission electron microscopy, electron energy loss spectroscopy, and first-principles calculations. Direct contact between Pt nanoparticles and TiO is realized after the postdeposition treatment, which is accompanied by the formation of a Ti state on the TiO surface close to the Pt nanoparticles and a Pt state on the Pt nanoparticles. The origin of these two states and their effect on the catalytic properties are discussed. These findings pave the way for a comprehensive understanding of metal-support interactions in supported metal catalysts.
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| http://dx.doi.org/10.1021/acs.nanolett.1c03485 | DOI Listing |
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