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New Insights into Corrosion of Ruthenium and Ruthenium Oxide Nanoparticles in Acidic Media

Nejc Hodnik, Primož Jovanovič

2023encorrosionrutheniumnanoparticlesacidic mediaelectrochemical

Abstract

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The dissolution behaviors of Ru and ruthenium oxide nanoparticles in acidic media were studied for the first time using highly sensitive in situ measurements of concentration by inductively coupled plasma mass spectrometry (ICP-MS). Online time- and potential-resolved electrochemical dissolution profiles revealed novel corrosion features in the potential window from 0 to ∼1.4 V, reflecting severe dissolution due to the oxygen evolution reaction (OER). It was found that an as-synthesized Ru sample exhibited a significantly higher dissolution rate than an electrochemically oxidized amorphous Ru sample, which dissolved roughly 10 times faster than rutile RuO2. The observed OER activity inversely correlated with the measured dissolution, indicating a discrepancy with the general assumption that OER onset coincides with Ru dissolution onset. Notably, Ru dissolution occurred at approximately 0.17 V lower potentials than the OER across all samples. These findings provide critical insights applicable to various energy conversion devices, including proton-exchange membrane electrolyzers, low-temperature fuel cells, and photocatalysts utilizing Ru as an active component.

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Cite This Work

@article{f6674a3b-e17d-444c-b5bc-48c88f9abaf2,
  title={New Insights into Corrosion of Ruthenium and Ruthenium Oxide Nanoparticles in Acidic Media},
  author={Nejc Hodnik and Primož Jovanovič},
  year={2023},
  language={en}
}
TY  - JOUR
TI  - New Insights into Corrosion of Ruthenium and Ruthenium Oxide Nanoparticles in Acidic Media
AU  - Nejc Hodnik
AU  - Primož Jovanovič
PY  - 2023
LA  - en
ER  -

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