Hydrogen and oxygen adsorption stoichiometries on silica supported ruthenium nanoparticles

Romain Berthoud, Pierre Délichère, David Gajan, Wayne Lukens, Katrin Pelzer, Jean Marie Basset, Jean Pierre Candy*, Christophe Copéret

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Treatment under H2 at 300 °C of Ru(COD)(COT) dispersed on silica yields 2 nm ruthenium nanoparticles, [Rup/SiO2], according to EXAFS, HRTEM and XPS. H2 adsorption measurements on [Rup/SiO2] in the absence of O2 show that Ru particles adsorb up to ca. 2H per surface ruthenium atoms (2H/Rus) on various samples; this technique can therefore be used to measure the dispersion of Ru particles. In contrast, O2 adsorption on [Rup/SiO2] leads to a partial oxidation of the bulk at 25 °C, to RuO2 at 200 °C and to sintering upon further reduction under H2, showing that O2 adsorption cannot be used to measure the dispersion of Ru particles.

Original languageEnglish (US)
Pages (from-to)387-391
Number of pages5
JournalJournal of Catalysis
Volume260
Issue number2
DOIs
StatePublished - Dec 10 2008

Keywords

  • Adsorption
  • H
  • O
  • Particles
  • Ruthenium
  • Silica

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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