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

Hodnik, N., Jovanovič, P., Pavlišič, A., Jozinović, B., Zorko, M., Bele, M., et al. (2015). New Insights into Corrosion of Ruthenium and Ruthenium Oxide Nanoparticles in Acidic Media. The Journal of Physical Chemistry C, 119(18), 10140-10147. doi:10.1021/acs.jpcc.5b01832.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-54C4-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-54D5-5
Genre: Journal Article

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 Creators:
Hodnik, Nejc1, 2, Author              
Jovanovič, Primož3, Author              
Pavlišič, Andraž3, Author              
Jozinović, Barbara3, Author              
Zorko, Milena1, Author              
Bele, Marjan4, Author              
Šelih, Vid Simon Imon5, Author              
Šala, Martin5, Author              
Hočevar, Samo B.5, Author              
Gaberšček, Miran4, Author              
Affiliations:
1National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia, ou_persistent22              
2Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
3Laboratory for Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia, ou_persistent22              
4National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia, ou_persistent22              
5Analytical Chemistry Laboratory, National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia, ou_persistent22              

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Free keywords: Electrochemical dissolution; Energy conversion and storages; Inductively coupled plasma mass spectrometries (ICPMS); Low temperature fuel cells; Oxygen evolution reaction; Proton exchange membrane electrolyzers; Thermodynamic changes; Transient dissolution
 Abstract: 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 (signals) in the potential window from 0 to similar to 1.4 V, where known severe dissolution due to the oxygen evolution reaction (OER) takes place. Most of the features follow the thermodynamic changes of the Ru oxidation/reduction state, which consequently trigger so-called transient dissolution. An as synthesized Ru sample was found to exhibit an order of magnitude higher dissolution rate than an electrochemically oxidized amorphous Ru sample. The latter, in turn, dissolved about 10 times faster than rutile RuO2. The observed OER activity was in an inverse relationship with the measured dissolution. Disagreement was found with the general assumption that the onset of the OER should coincide with the onset of go dissolution. Interestingly, in all samples, Ru dissolution was observed at about 0.17 V lower potentials than the OER. The present results are relevant for various energy-conversion and -storage devices such as proton exchange membrane electrolyzers, low temperature fuel cells, reverse fuel cells, supercapacitors, batteries, and photocatalysts that can contain Ru as an active component.

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Language(s): eng - English
 Dates: 2015-05-07
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000354339000051
DOI: 10.1021/acs.jpcc.5b01832
 Degree: -

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Title: The Journal of Physical Chemistry C
  Abbreviation : J. Phys. Chem. C
Source Genre: Journal
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Publ. Info: Washington DC : American Chemical Society
Pages: - Volume / Issue: 119 (18) Sequence Number: - Start / End Page: 10140 - 10147 Identifier: ISSN: 1932-7447
CoNE: /journals/resource/954926947766