Atomic and Electronic Structure of Pt/TiO2 Catalysts and Their Relationship to Catalytic Activity

Hajime Hojo, Miki Gondo, Satoru Yoshizaki, Hisahiro Einaga

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

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/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 Ptδ+ 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.

Original languageEnglish
Pages (from-to)145-150
Number of pages6
JournalNano Letters
Volume22
Issue number1
DOIs
Publication statusPublished - Jan 12 2022

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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