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Formation of RuO(OH)(2) on RuO2-Based Electrodes for Hydrogen Production
Linkoping Univ, Thin Film Phys Div, Dept Phys Chem & Biol IFM, SE-58183 Linkoping, Sweden.
Linkoping Univ, Thin Film Phys Div, Dept Phys Chem & Biol IFM, SE-58183 Linkoping, Sweden.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. Permascand AB, SE-84010 Ljungaverk, Sweden.
Linkoping Univ, Thin Film Phys Div, Dept Phys Chem & Biol IFM, SE-58183 Linkoping, Sweden.
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
2014. Vol. 118, no 28, 15315-15323 p.
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:miun:diva-22600DOI: 10.1021/jp503960qISI: 000339368700026Scopus ID: 2-s2.0-84904556524OAI: oai:DiVA.org:miun-22600DiVA: diva2:738882
Available from: 2014-08-19 Created: 2014-08-19 Last updated: 2014-08-19Bibliographically approved

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