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Journal Article

Hydrogen and oxygen adsorption stoichiometries on silica supported ruthenium nanoparticles

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Pelzer,  Katrin
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Berthoud, R., Delichere, P., Gajan, D., Lukens, W., Pelzer, K., Basset, J.-M., et al. (2008). Hydrogen and oxygen adsorption stoichiometries on silica supported ruthenium nanoparticles. Journal of Catalysis, 260(2), 387-391. doi:10.1016/j.jcat.2008.10.010.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-FB58-A
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.