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Formation of RuO(OH)(2) on RuO2-Based Electrodes for Hydrogen Production
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
Permascand AB, Ljungaverk, Sweden; Mid Sweden University, Sundsvall, Sweden.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.
2014 (English)In: The Journal of Physical Chemistry C, ISSN 1932-7447, E-ISSN 1932-7455, Vol. 118, no 28, 15315-15323 p.Article in journal (Refereed) Published
Abstract [en]

The catalytic and durable electrode coating of ruthenium dioxide (RuO2), applied on nickel (Ni) substrates, is today utilized as electrocatalytic cathodes for hydrogen production, e.g., in the chlor-alkali process and alkaline water electrolysis. The drawback is, however, the sensitivity to reverse currents obtained during power shutdowns, e.g., at maintenance, where the RuO2-based electrodes can be severely damaged unless polarization rectifiers are employed. Through the material characterization techniques X-ray diffraction and X-ray photoelectron spectroscopy, we can now reveal that RuO2 coatings, when exposed to hydrogen evolution at industrially relevant conditions, transforms into ruthenium oxyhydroxide (RuO(OH)(2)). The study further shows that as the hydrogen evolution proceeds the formed RuO(OH)(2) reduces to metallic ruthenium (Ru).

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2014. Vol. 118, no 28, 15315-15323 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-109369DOI: 10.1021/jp503960qISI: 000339368700026OAI: oai:DiVA.org:liu-109369DiVA: diva2:738065
Available from: 2014-08-15 Created: 2014-08-15 Last updated: 2017-12-05Bibliographically approved

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Näslund, Lars-ÅkeIngason, Arni SigurdurRosén, Johanna

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