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

doi:10.1016/j.jcat.2008.10.010

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 journal › Article › peer-review

35 Scopus citations

Abstract

Treatment under H₂ at 300 °C of Ru(COD)(COT) dispersed on silica yields 2 nm ruthenium nanoparticles, [Ru_p/SiO₂], according to EXAFS, HRTEM and XPS. H₂ adsorption measurements on [Ru_p/SiO₂] in the absence of O₂ show that Ru particles adsorb up to ca. 2H per surface ruthenium atoms (2H/Ru_s) on various samples; this technique can therefore be used to measure the dispersion of Ru particles. In contrast, O₂ adsorption on [Ru_p/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 language	English (US)
Pages (from-to)	387-391
Number of pages	5
Journal	Journal of Catalysis
Volume	260
Issue number	2
DOIs	https://doi.org/10.1016/j.jcat.2008.10.010
State	Published - Dec 10 2008
Externally published	Yes

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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10.1016/j.jcat.2008.10.010

Cite this

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title = "Hydrogen and oxygen adsorption stoichiometries on silica supported ruthenium nanoparticles",

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.",

keywords = "Adsorption, H, O, Particles, Ruthenium, Silica",

author = "Romain Berthoud and Pierre D{\'e}lich{\`e}re and David Gajan and Wayne Lukens and Katrin Pelzer and Basset, {Jean Marie} and Candy, {Jean Pierre} and Christophe Cop{\'e}ret",

note = "Funding Information: R.B. and D.G. thank le Minist{\`e}re de la Recherche et de l'Education and the R{\'e}gion Rh{\^o}ne-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. ",

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AU - Berthoud, Romain

AU - Délichère, Pierre

AU - Gajan, David

AU - Lukens, Wayne

AU - Pelzer, Katrin

AU - Basset, Jean Marie

AU - Candy, Jean Pierre

AU - Copéret, Christophe

N1 - 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.

PY - 2008/12/10

Y1 - 2008/12/10

N2 - 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.

AB - 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.

KW - Adsorption

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Hydrogen and oxygen adsorption stoichiometries on silica supported ruthenium nanoparticles

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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