Oxygen evolution on well-characterized mass-selected Ru and RuO 2 nanoparticles

Oxygen evolution was investigated on model, mass-selected RuO 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 acti...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2015-01, Vol.6 (1), p.190-196
Main Authors: Paoli, Elisa A, Masini, Federico, Frydendal, Rasmus, Deiana, Davide, Schlaup, Christian, Malizia, Mauro, Hansen, Thomas W, Horch, Sebastian, Stephens, Ifan E L, Chorkendorff, Ib
Format: Article
Language:English
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Summary:Oxygen evolution was investigated on model, mass-selected RuO 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 RuO 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 and a turnover frequency of 0.65 s , one order of magnitude higher than the current state-of-the-art.
ISSN:2041-6520
2041-6539
DOI:10.1039/c4sc02685c