Study of the interfacial structure of a Pt/α-Al2O 3 model catalyst under high-temperature hydrogen reduction

Xiaoyan Zhong, Jing Zhu, Jingyue Liu

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

We investigated the interface structure between the Pt nanoparticles and the alumina support in a Pt/Al2O3 model catalyst reduced in flowing hydrogen gas at different temperatures by cross-sectional atomic-resolution transmission electron microscopy nanodiffraction techniques. An interfacial Pt8Al21 alloy with a tetragonal structure was formed at the Pt-alumina interface during the high-temperature reduction at 1073 K. This alloy phase was not formed when the Pt/Al2O3 model catalyst was reduced at 773 K. The platinum-assisted reduction of the alumina support and the subsequent strong metal-support interaction at the interface may be responsible for the formation of the interfacial alloy phase.

Original languageEnglish (US)
Pages (from-to)9-13
Number of pages5
JournalJournal of Catalysis
Volume236
Issue number1
DOIs
StatePublished - Nov 15 2005
Externally publishedYes

Keywords

  • Alumina
  • Catalyst
  • Electron microscopy
  • Interfacial phase
  • Metal-support interaction
  • Platinum

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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