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

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.

SUBMITTER: Paoli EA

PROVIDER: S-EPMC5424673 | biostudies-literature | 2015 Jan

REPOSITORIES: biostudies-literature

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

Paoli Elisa A EA Masini Federico F Frydendal Rasmus R Deiana Davide D Schlaup Christian C Malizia Mauro M Hansen Thomas W TW Horch Sebastian S Stephens Ifan E L IEL Chorkendorff Ib I

Chemical science 20140926 1

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 tu ...[more]

PMID: 28553467

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