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

35 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

Bibliographical note

Funding Information:
R.B. and D.G. thank le Ministère de la Recherche et de l'Education and the Région Rhône-Alpes (Cluster 5) for graduate fellowships, respectively. We are all grateful to the CNRS (PICS program), CPE Lyon and IDECAT for financial supports. Portions of this work were performed at the LBNL, supported by the Director, Office of Science, Office of Basic Energy Sciences of the US Department of Energy under Contract No. DE-AC02-05CH11231, and at the Stanford Synchrotron Radiation Laboratory, a national user facility operated by Stanford University on behalf of the US Department of Energy, Office of Basic Energy Sciences.

Keywords

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

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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