Oxygen evolution on well-characterized mass-selected Ru and RuO2 nanoparticles

Elisa Antares Paoli, Federico Masini, Rasmus Frydendal, Davide Deiana, Christian Georg Schlaup, Mauro Malizia, Thomas Willum Hansen, Sebastian Horch, Ifan Stephens, Ib Chorkendorff

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Abstract

Oxygen evolution was investigated on model, mass-selected RuO2 nanoparticles in acid, prepared by magnetron sputtering. Our investigations include electrochemical measurements, electron microscopy, scanning tunneling microscopy and X-ray photoelectron spectroscopy. We show that the stability and activity of nanoparticulate RuO2 is highly sensitive to its surface pretreatment. At 0.25 V overpotential, the catalysts show a mass activity of up to 0.6 A mg(-1) and a turnover frequency of 0.65 s-1, one order of magnitude higher than the current state-of-the-art.
Original languageEnglish
JournalChemical Science
Volume6
Issue number1
Pages (from-to)190-196
Number of pages7
ISSN2041-6520
DOIs
Publication statusPublished - 2015

Bibliographical note

© The Royal Society of Chemistry 2015

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