EXAFS study of the CO-adsorption-induced morphology change in rutheniun clusters supported on alumina

Takanori Mizushima, Kazuyuki Tohji, Yasuo Udagawa, Akifumi Ueno

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)

Abstract

Highly dispersed Ru/Al2O3 catalysts were prepared from Ru3(CO)12. EXAFS (extended X-ray absorption fine structure) studies show that all the Ru atoms in the catalyst are in small metal clusters. The Ru clusters are so small that the oxygen atoms at the cluster-support interface have a significant contribution to the EXAFS signal. Adsorption of CO completely changes the structure of this small metal cluster as is evidenced from EXAFS oscillation; Ru-Ru bonds are disrupted and Al-O-Ru-(CO)n (n = 1-2) is formed. When the temperature is raised, Ru atoms agglomerate and small metal clusters are recovered. Infrared spectroscopic observation supports the conclusions obtained from EXAFS.

Original languageEnglish
Pages (from-to)4980-4985
Number of pages6
JournalJournal of physical chemistry
Volume94
Issue number12
DOIs
Publication statusPublished - 1990

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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