Journal
NANO LETTERS
Volume 22, Issue 1, Pages 145-150Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c03485
Keywords
Metal-support interaction; ethanol dehydrogenation; transmission electron microscopy; electron energy loss spectroscopy; first-principles calculations
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Funding
- JAPAN Science and Technology Agency (JST) FOREST project [JPMJFR201UA]
- JSPS KAKENHI [20H02824]
- Asahi Glass Foundation
- Nanotechnology Platform Program Molecule and Material Synthesis of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan [JPMXP09 S21KU0047]
- Grants-in-Aid for Scientific Research [20H02824] Funding Source: KAKEN
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The study found that model Pt/TiO2 catalysts formed Ti3+ and Pt delta+ states after inducing catalytic activity through postdeposition treatment, highlighting the significance of understanding the metal-support interactions in supported metal catalysts.
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/TiO2 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 TiO2 is realized after the postdeposition treatment, which is accompanied by the formation of a Ti3+ state on the TiO2 surface close to the Pt nanoparticles and a Pt delta+ 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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